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Finding the Fourth Proportional to 469,989.28, 648,597 and 255,129.40

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Solution

The fourth proportional to 469,989.28, 648,597 and 255,129.40 is: 352,084.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    469,989.28 : 648,597 = 255,129.40 : x
  2. Step 2: Convert to fraction form
    469,989.28/648,597 = 255,129.40/x
  3. Step 3: Cross multiply
    469,989.28x = 648,597 × 255,129.40
  4. Step 4: Simplify right side
    469,989.28x = 165,476,163,451.80
  5. Step 5: Solve for x
    x = 165,476,163,451.80/469,989.28
  6. Step 6: Final answer
    x = 352,084.97

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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.