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Finding the Fourth Proportional to 768,101.03, 1,059,978.76 and 428,569.28

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Solution

The fourth proportional to 768,101.03, 1,059,978.76 and 428,569.28 is: 591,425.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    768,101.03 : 1,059,978.76 = 428,569.28 : x
  2. Step 2: Convert to fraction form
    768,101.03/1,059,978.76 = 428,569.28/x
  3. Step 3: Cross multiply
    768,101.03x = 1,059,978.76 × 428,569.28
  4. Step 4: Simplify right side
    768,101.03x = 454,274,331,592.10
  5. Step 5: Solve for x
    x = 454,274,331,592.10/768,101.03
  6. Step 6: Final answer
    x = 591,425.24

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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.