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Finding the Fourth Proportional to 889,691.52, 1,223,792.64 and 780,257.28

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Solution

The fourth proportional to 889,691.52, 1,223,792.64 and 780,257.28 is: 1,073,263.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    889,691.52 : 1,223,792.64 = 780,257.28 : x
  2. Step 2: Convert to fraction form
    889,691.52/1,223,792.64 = 780,257.28/x
  3. Step 3: Cross multiply
    889,691.52x = 1,223,792.64 × 780,257.28
  4. Step 4: Simplify right side
    889,691.52x = 954,873,116,570.42
  5. Step 5: Solve for x
    x = 954,873,116,570.42/889,691.52
  6. Step 6: Final answer
    x = 1,073,263.14

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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.