Home / 665,053.80-917,445.39-392,990.06

Finding the Fourth Proportional to 665,053.80, 917,445.39 and 392,990.06

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Solution

The fourth proportional to 665,053.80, 917,445.39 and 392,990.06 is: 542,131.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,053.80 : 917,445.39 = 392,990.06 : x
  2. Step 2: Convert to fraction form
    665,053.80/917,445.39 = 392,990.06/x
  3. Step 3: Cross multiply
    665,053.80x = 917,445.39 × 392,990.06
  4. Step 4: Simplify right side
    665,053.80x = 360,546,914,275.60
  5. Step 5: Solve for x
    x = 360,546,914,275.60/665,053.80
  6. Step 6: Final answer
    x = 542,131.95

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.