Home / 765,944.76-1,148,118.48-428,490.66

Finding the Fourth Proportional to 765,944.76, 1,148,118.48 and 428,490.66

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Solution

The fourth proportional to 765,944.76, 1,148,118.48 and 428,490.66 is: 642,289.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    765,944.76 : 1,148,118.48 = 428,490.66 : x
  2. Step 2: Convert to fraction form
    765,944.76/1,148,118.48 = 428,490.66/x
  3. Step 3: Cross multiply
    765,944.76x = 1,148,118.48 × 428,490.66
  4. Step 4: Simplify right side
    765,944.76x = 491,958,045,253.40
  5. Step 5: Solve for x
    x = 491,958,045,253.40/765,944.76
  6. Step 6: Final answer
    x = 642,289.20

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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.