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Finding the Fourth Proportional to 662,740.74, 914,423.45 and 390,787.29

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Solution

The fourth proportional to 662,740.74, 914,423.45 and 390,787.29 is: 539,192.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    662,740.74 : 914,423.45 = 390,787.29 : x
  2. Step 2: Convert to fraction form
    662,740.74/914,423.45 = 390,787.29/x
  3. Step 3: Cross multiply
    662,740.74x = 914,423.45 × 390,787.29
  4. Step 4: Simplify right side
    662,740.74x = 357,345,059,984.01
  5. Step 5: Solve for x
    x = 357,345,059,984.01/662,740.74
  6. Step 6: Final answer
    x = 539,192.84

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.