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Finding the Fourth Proportional to 502,427.10, 753,640.65 and 455,187.90

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Solution

The fourth proportional to 502,427.10, 753,640.65 and 455,187.90 is: 682,781.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    502,427.10 : 753,640.65 = 455,187.90 : x
  2. Step 2: Convert to fraction form
    502,427.10/753,640.65 = 455,187.90/x
  3. Step 3: Cross multiply
    502,427.10x = 753,640.65 × 455,187.90
  4. Step 4: Simplify right side
    502,427.10x = 343,048,104,828.14
  5. Step 5: Solve for x
    x = 343,048,104,828.14/502,427.10
  6. Step 6: Final answer
    x = 682,781.85

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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.