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Finding the Fourth Proportional to 627,434.40, 941,151.60 and 428,368.80

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Solution

The fourth proportional to 627,434.40, 941,151.60 and 428,368.80 is: 642,553.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    627,434.40 : 941,151.60 = 428,368.80 : x
  2. Step 2: Convert to fraction form
    627,434.40/941,151.60 = 428,368.80/x
  3. Step 3: Cross multiply
    627,434.40x = 941,151.60 × 428,368.80
  4. Step 4: Simplify right side
    627,434.40x = 403,159,981,510.08
  5. Step 5: Solve for x
    x = 403,159,981,510.08/627,434.40
  6. Step 6: Final answer
    x = 642,553.20

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Similar ratio
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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.