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Finding the Fourth Proportional to 353,133.60, 529,354.80 and 142,490.40

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Solution

The fourth proportional to 353,133.60, 529,354.80 and 142,490.40 is: 213,596.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,133.60 : 529,354.80 = 142,490.40 : x
  2. Step 2: Convert to fraction form
    353,133.60/529,354.80 = 142,490.40/x
  3. Step 3: Cross multiply
    353,133.60x = 529,354.80 × 142,490.40
  4. Step 4: Simplify right side
    353,133.60x = 75,427,977,193.92
  5. Step 5: Solve for x
    x = 75,427,977,193.92/353,133.60
  6. Step 6: Final answer
    x = 213,596.15

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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.