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Finding the Fourth Proportional to 607,407.80, 910,593.30 and 429,354.68

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Solution

The fourth proportional to 607,407.80, 910,593.30 and 429,354.68 is: 643,665.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    607,407.80 : 910,593.30 = 429,354.68 : x
  2. Step 2: Convert to fraction form
    607,407.80/910,593.30 = 429,354.68/x
  3. Step 3: Cross multiply
    607,407.80x = 910,593.30 × 429,354.68
  4. Step 4: Simplify right side
    607,407.80x = 390,967,494,931.64
  5. Step 5: Solve for x
    x = 390,967,494,931.64/607,407.80
  6. Step 6: Final answer
    x = 643,665.58

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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.