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Finding the Fourth Proportional to 647,279.10, 970,918.65 and 423,330.30

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Solution

The fourth proportional to 647,279.10, 970,918.65 and 423,330.30 is: 634,995.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,279.10 : 970,918.65 = 423,330.30 : x
  2. Step 2: Convert to fraction form
    647,279.10/970,918.65 = 423,330.30/x
  3. Step 3: Cross multiply
    647,279.10x = 970,918.65 × 423,330.30
  4. Step 4: Simplify right side
    647,279.10x = 411,019,283,380.10
  5. Step 5: Solve for x
    x = 411,019,283,380.10/647,279.10
  6. Step 6: Final answer
    x = 634,995.45

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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.