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Finding the Fourth Proportional to 353,079.20, 529,424.40 and 142,479.20

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Solution

The fourth proportional to 353,079.20, 529,424.40 and 142,479.20 is: 213,640.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,079.20 : 529,424.40 = 142,479.20 : x
  2. Step 2: Convert to fraction form
    353,079.20/529,424.40 = 142,479.20/x
  3. Step 3: Cross multiply
    353,079.20x = 529,424.40 × 142,479.20
  4. Step 4: Simplify right side
    353,079.20x = 75,431,964,972.48
  5. Step 5: Solve for x
    x = 75,431,964,972.48/353,079.20
  6. Step 6: Final answer
    x = 213,640.35

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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.