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Finding the Fourth Proportional to 608,053.72, 838,909.56 and 393,465.28

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Solution

The fourth proportional to 608,053.72, 838,909.56 and 393,465.28 is: 542,849.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    608,053.72 : 838,909.56 = 393,465.28 : x
  2. Step 2: Convert to fraction form
    608,053.72/838,909.56 = 393,465.28/x
  3. Step 3: Cross multiply
    608,053.72x = 838,909.56 × 393,465.28
  4. Step 4: Simplify right side
    608,053.72x = 330,081,784,920.08
  5. Step 5: Solve for x
    x = 330,081,784,920.08/608,053.72
  6. Step 6: Final answer
    x = 542,849.71

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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.