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Finding the Fourth Proportional to 627,817.60, 941,726.40 and 391,427.20

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Solution

The fourth proportional to 627,817.60, 941,726.40 and 391,427.20 is: 587,140.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    627,817.60 : 941,726.40 = 391,427.20 : x
  2. Step 2: Convert to fraction form
    627,817.60/941,726.40 = 391,427.20/x
  3. Step 3: Cross multiply
    627,817.60x = 941,726.40 × 391,427.20
  4. Step 4: Simplify right side
    627,817.60x = 368,617,327,918.08
  5. Step 5: Solve for x
    x = 368,617,327,918.08/627,817.60
  6. Step 6: Final answer
    x = 587,140.80

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Double scale
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Similar ratio
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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.