Home / 457,932.60-687,003.30-142,421.40

Finding the Fourth Proportional to 457,932.60, 687,003.30 and 142,421.40

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Solution

The fourth proportional to 457,932.60, 687,003.30 and 142,421.40 is: 213,664.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    457,932.60 : 687,003.30 = 142,421.40 : x
  2. Step 2: Convert to fraction form
    457,932.60/687,003.30 = 142,421.40/x
  3. Step 3: Cross multiply
    457,932.60x = 687,003.30 × 142,421.40
  4. Step 4: Simplify right side
    457,932.60x = 97,843,971,790.62
  5. Step 5: Solve for x
    x = 97,843,971,790.62/457,932.60
  6. Step 6: Final answer
    x = 213,664.57

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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.