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Finding the Fourth Proportional to 638,409.70, 955,925.09 and 385,351.93

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Solution

The fourth proportional to 638,409.70, 955,925.09 and 385,351.93 is: 577,008.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,409.70 : 955,925.09 = 385,351.93 : x
  2. Step 2: Convert to fraction form
    638,409.70/955,925.09 = 385,351.93/x
  3. Step 3: Cross multiply
    638,409.70x = 955,925.09 × 385,351.93
  4. Step 4: Simplify right side
    638,409.70x = 368,367,581,247.75
  5. Step 5: Solve for x
    x = 368,367,581,247.75/638,409.70
  6. Step 6: Final answer
    x = 577,008.12

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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.