Home / 765,949.76-1,148,125.98-428,495.66

Finding the Fourth Proportional to 765,949.76, 1,148,125.98 and 428,495.66

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Solution

The fourth proportional to 765,949.76, 1,148,125.98 and 428,495.66 is: 642,296.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    765,949.76 : 1,148,125.98 = 428,495.66 : x
  2. Step 2: Convert to fraction form
    765,949.76/1,148,125.98 = 428,495.66/x
  3. Step 3: Cross multiply
    765,949.76x = 1,148,125.98 × 428,495.66
  4. Step 4: Simplify right side
    765,949.76x = 491,966,999,563.25
  5. Step 5: Solve for x
    x = 491,966,999,563.25/765,949.76
  6. Step 6: Final answer
    x = 642,296.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.