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Finding the Fourth Proportional to 353,145.60, 529,372.80 and 142,502.40

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Solution

The fourth proportional to 353,145.60, 529,372.80 and 142,502.40 is: 213,614.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,145.60 : 529,372.80 = 142,502.40 : x
  2. Step 2: Convert to fraction form
    353,145.60/529,372.80 = 142,502.40/x
  3. Step 3: Cross multiply
    353,145.60x = 529,372.80 × 142,502.40
  4. Step 4: Simplify right side
    353,145.60x = 75,436,894,494.72
  5. Step 5: Solve for x
    x = 75,436,894,494.72/353,145.60
  6. Step 6: Final answer
    x = 213,614.14

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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.