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Finding the Fourth Proportional to 615,705.10, 921,808.05 and 545,721.10

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Solution

The fourth proportional to 615,705.10, 921,808.05 and 545,721.10 is: 817,030.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,705.10 : 921,808.05 = 545,721.10 : x
  2. Step 2: Convert to fraction form
    615,705.10/921,808.05 = 545,721.10/x
  3. Step 3: Cross multiply
    615,705.10x = 921,808.05 × 545,721.10
  4. Step 4: Simplify right side
    615,705.10x = 503,050,103,034.86
  5. Step 5: Solve for x
    x = 503,050,103,034.86/615,705.10
  6. Step 6: Final answer
    x = 817,030.92

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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.