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Finding the Fourth Proportional to 654,849.20, 903,152.76 and 386,318

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Solution

The fourth proportional to 654,849.20, 903,152.76 and 386,318 is: 532,800.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    654,849.20 : 903,152.76 = 386,318 : x
  2. Step 2: Convert to fraction form
    654,849.20/903,152.76 = 386,318/x
  3. Step 3: Cross multiply
    654,849.20x = 903,152.76 × 386,318
  4. Step 4: Simplify right side
    654,849.20x = 348,904,167,937.68
  5. Step 5: Solve for x
    x = 348,904,167,937.68/654,849.20
  6. Step 6: Final answer
    x = 532,800.79

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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.