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Finding the Fourth Proportional to 389,613.70, 584,420.55 and 256,644.10

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Solution

The fourth proportional to 389,613.70, 584,420.55 and 256,644.10 is: 384,966.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,613.70 : 584,420.55 = 256,644.10 : x
  2. Step 2: Convert to fraction form
    389,613.70/584,420.55 = 256,644.10/x
  3. Step 3: Cross multiply
    389,613.70x = 584,420.55 × 256,644.10
  4. Step 4: Simplify right side
    389,613.70x = 149,988,086,076.26
  5. Step 5: Solve for x
    x = 149,988,086,076.26/389,613.70
  6. Step 6: Final answer
    x = 384,966.15

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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.