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Finding the Fourth Proportional to 402,456.60, 603,684.90 and 215,832.60

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Solution

The fourth proportional to 402,456.60, 603,684.90 and 215,832.60 is: 323,748.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,456.60 : 603,684.90 = 215,832.60 : x
  2. Step 2: Convert to fraction form
    402,456.60/603,684.90 = 215,832.60/x
  3. Step 3: Cross multiply
    402,456.60x = 603,684.90 × 215,832.60
  4. Step 4: Simplify right side
    402,456.60x = 130,294,881,547.74
  5. Step 5: Solve for x
    x = 130,294,881,547.74/402,456.60
  6. Step 6: Final answer
    x = 323,748.90

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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.