Home / 687,761.28-949,111.04-385,955.20

Finding the Fourth Proportional to 687,761.28, 949,111.04 and 385,955.20

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Solution

The fourth proportional to 687,761.28, 949,111.04 and 385,955.20 is: 532,618.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,761.28 : 949,111.04 = 385,955.20 : x
  2. Step 2: Convert to fraction form
    687,761.28/949,111.04 = 385,955.20/x
  3. Step 3: Cross multiply
    687,761.28x = 949,111.04 × 385,955.20
  4. Step 4: Simplify right side
    687,761.28x = 366,314,341,265.41
  5. Step 5: Solve for x
    x = 366,314,341,265.41/687,761.28
  6. Step 6: Final answer
    x = 532,618.44

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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.