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Finding the Fourth Proportional to 321,307.40, 481,961.10 and 188,337.80

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Solution

The fourth proportional to 321,307.40, 481,961.10 and 188,337.80 is: 282,506.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,307.40 : 481,961.10 = 188,337.80 : x
  2. Step 2: Convert to fraction form
    321,307.40/481,961.10 = 188,337.80/x
  3. Step 3: Cross multiply
    321,307.40x = 481,961.10 × 188,337.80
  4. Step 4: Simplify right side
    321,307.40x = 90,771,493,259.58
  5. Step 5: Solve for x
    x = 90,771,493,259.58/321,307.40
  6. Step 6: Final answer
    x = 282,506.70

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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.