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Finding the Fourth Proportional to 486,740.84, 728,335 and 287,156.84

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Solution

The fourth proportional to 486,740.84, 728,335 and 287,156.84 is: 429,687.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,740.84 : 728,335 = 287,156.84 : x
  2. Step 2: Convert to fraction form
    486,740.84/728,335 = 287,156.84/x
  3. Step 3: Cross multiply
    486,740.84x = 728,335 × 287,156.84
  4. Step 4: Simplify right side
    486,740.84x = 209,146,377,061.40
  5. Step 5: Solve for x
    x = 209,146,377,061.40/486,740.84
  6. Step 6: Final answer
    x = 429,687.34

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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.