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Finding the Fourth Proportional to 865,978.81, 1,195,030.09 and 484,041.13

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Solution

The fourth proportional to 865,978.81, 1,195,030.09 and 484,041.13 is: 667,965.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    865,978.81 : 1,195,030.09 = 484,041.13 : x
  2. Step 2: Convert to fraction form
    865,978.81/1,195,030.09 = 484,041.13/x
  3. Step 3: Cross multiply
    865,978.81x = 1,195,030.09 × 484,041.13
  4. Step 4: Simplify right side
    865,978.81x = 578,443,712,765.08
  5. Step 5: Solve for x
    x = 578,443,712,765.08/865,978.81
  6. Step 6: Final answer
    x = 667,965.21

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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.