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Finding the Fourth Proportional to 631,292.60, 946,938.90 and 418,716.20

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Solution

The fourth proportional to 631,292.60, 946,938.90 and 418,716.20 is: 628,074.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,292.60 : 946,938.90 = 418,716.20 : x
  2. Step 2: Convert to fraction form
    631,292.60/946,938.90 = 418,716.20/x
  3. Step 3: Cross multiply
    631,292.60x = 946,938.90 × 418,716.20
  4. Step 4: Simplify right side
    631,292.60x = 396,498,657,840.18
  5. Step 5: Solve for x
    x = 396,498,657,840.18/631,292.60
  6. Step 6: Final answer
    x = 628,074.30

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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.