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Finding the Fourth Proportional to 664,656.40, 996,984.60 and 221,424.40

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Solution

The fourth proportional to 664,656.40, 996,984.60 and 221,424.40 is: 332,136.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,656.40 : 996,984.60 = 221,424.40 : x
  2. Step 2: Convert to fraction form
    664,656.40/996,984.60 = 221,424.40/x
  3. Step 3: Cross multiply
    664,656.40x = 996,984.60 × 221,424.40
  4. Step 4: Simplify right side
    664,656.40x = 220,756,716,864.24
  5. Step 5: Solve for x
    x = 220,756,716,864.24/664,656.40
  6. Step 6: Final answer
    x = 332,136.60

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Half scale
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Double scale
Find fourth proportional to 664,657.40, 996,986.10 and 221,425.40
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.