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Finding the Fourth Proportional to 739,478.40, 1,107,662.40 and 615,062.40

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Solution

The fourth proportional to 739,478.40, 1,107,662.40 and 615,062.40 is: 921,300.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    739,478.40 : 1,107,662.40 = 615,062.40 : x
  2. Step 2: Convert to fraction form
    739,478.40/1,107,662.40 = 615,062.40/x
  3. Step 3: Cross multiply
    739,478.40x = 1,107,662.40 × 615,062.40
  4. Step 4: Simplify right side
    739,478.40x = 681,281,494,133.76
  5. Step 5: Solve for x
    x = 681,281,494,133.76/739,478.40
  6. Step 6: Final answer
    x = 921,300.06

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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.