Home / 811,435.20-1,217,152.80-220,459.20

Finding the Fourth Proportional to 811,435.20, 1,217,152.80 and 220,459.20

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Solution

The fourth proportional to 811,435.20, 1,217,152.80 and 220,459.20 is: 330,688.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,435.20 : 1,217,152.80 = 220,459.20 : x
  2. Step 2: Convert to fraction form
    811,435.20/1,217,152.80 = 220,459.20/x
  3. Step 3: Cross multiply
    811,435.20x = 1,217,152.80 × 220,459.20
  4. Step 4: Simplify right side
    811,435.20x = 268,332,532,565.76
  5. Step 5: Solve for x
    x = 268,332,532,565.76/811,435.20
  6. Step 6: Final answer
    x = 330,688.80

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Double scale
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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.