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Finding the Fourth Proportional to 627,891.40, 941,837.10 and 428,825.80

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Solution

The fourth proportional to 627,891.40, 941,837.10 and 428,825.80 is: 643,238.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    627,891.40 : 941,837.10 = 428,825.80 : x
  2. Step 2: Convert to fraction form
    627,891.40/941,837.10 = 428,825.80/x
  3. Step 3: Cross multiply
    627,891.40x = 941,837.10 × 428,825.80
  4. Step 4: Simplify right side
    627,891.40x = 403,884,047,877.18
  5. Step 5: Solve for x
    x = 403,884,047,877.18/627,891.40
  6. Step 6: Final answer
    x = 643,238.70

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1.5x scale

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.