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Finding the Fourth Proportional to 402,325.30, 603,487.95 and 215,701.30

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Solution

The fourth proportional to 402,325.30, 603,487.95 and 215,701.30 is: 323,551.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,325.30 : 603,487.95 = 215,701.30 : x
  2. Step 2: Convert to fraction form
    402,325.30/603,487.95 = 215,701.30/x
  3. Step 3: Cross multiply
    402,325.30x = 603,487.95 × 215,701.30
  4. Step 4: Simplify right side
    402,325.30x = 130,173,135,349.34
  5. Step 5: Solve for x
    x = 130,173,135,349.34/402,325.30
  6. Step 6: Final answer
    x = 323,551.95

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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.