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Finding the Fourth Proportional to 717,250.01, 989,803.43 and 390,557.95

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Solution

The fourth proportional to 717,250.01, 989,803.43 and 390,557.95 is: 538,969.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,250.01 : 989,803.43 = 390,557.95 : x
  2. Step 2: Convert to fraction form
    717,250.01/989,803.43 = 390,557.95/x
  3. Step 3: Cross multiply
    717,250.01x = 989,803.43 × 390,557.95
  4. Step 4: Simplify right side
    717,250.01x = 386,575,597,025.66
  5. Step 5: Solve for x
    x = 386,575,597,025.66/717,250.01
  6. Step 6: Final answer
    x = 538,969.10

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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.