Home / 457,931.60-687,001.80-142,420.40

Finding the Fourth Proportional to 457,931.60, 687,001.80 and 142,420.40

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Solution

The fourth proportional to 457,931.60, 687,001.80 and 142,420.40 is: 213,663.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    457,931.60 : 687,001.80 = 142,420.40 : x
  2. Step 2: Convert to fraction form
    457,931.60/687,001.80 = 142,420.40/x
  3. Step 3: Cross multiply
    457,931.60x = 687,001.80 × 142,420.40
  4. Step 4: Simplify right side
    457,931.60x = 97,843,071,156.72
  5. Step 5: Solve for x
    x = 97,843,071,156.72/457,931.60
  6. Step 6: Final answer
    x = 213,663.07

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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.