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Finding the Fourth Proportional to 709,687.26, 979,334.28 and 403,734.90

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Solution

The fourth proportional to 709,687.26, 979,334.28 and 403,734.90 is: 557,134.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,687.26 : 979,334.28 = 403,734.90 : x
  2. Step 2: Convert to fraction form
    709,687.26/979,334.28 = 403,734.90/x
  3. Step 3: Cross multiply
    709,687.26x = 979,334.28 × 403,734.90
  4. Step 4: Simplify right side
    709,687.26x = 395,391,427,602.37
  5. Step 5: Solve for x
    x = 395,391,427,602.37/709,687.26
  6. Step 6: Final answer
    x = 557,134.74

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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.