Home / 485,623.60-727,657.80-319,217.20

Finding the Fourth Proportional to 485,623.60, 727,657.80 and 319,217.20

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Solution

The fourth proportional to 485,623.60, 727,657.80 and 319,217.20 is: 478,314.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,623.60 : 727,657.80 = 319,217.20 : x
  2. Step 2: Convert to fraction form
    485,623.60/727,657.80 = 319,217.20/x
  3. Step 3: Cross multiply
    485,623.60x = 727,657.80 × 319,217.20
  4. Step 4: Simplify right side
    485,623.60x = 232,280,885,474.16
  5. Step 5: Solve for x
    x = 232,280,885,474.16/485,623.60
  6. Step 6: Final answer
    x = 478,314.66

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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.