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Finding the Fourth Proportional to 545,007.63, 817,677.90 and 278,956.65

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Solution

The fourth proportional to 545,007.63, 817,677.90 and 278,956.65 is: 418,520.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,007.63 : 817,677.90 = 278,956.65 : x
  2. Step 2: Convert to fraction form
    545,007.63/817,677.90 = 278,956.65/x
  3. Step 3: Cross multiply
    545,007.63x = 817,677.90 × 278,956.65
  4. Step 4: Simplify right side
    545,007.63x = 228,096,687,763.04
  5. Step 5: Solve for x
    x = 228,096,687,763.04/545,007.63
  6. Step 6: Final answer
    x = 418,520.17

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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.