Home / 1,025,405.20-1,538,107.80-315,432.10

Finding the Fourth Proportional to 1,025,405.20, 1,538,107.80 and 315,432.10

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Solution

The fourth proportional to 1,025,405.20, 1,538,107.80 and 315,432.10 is: 473,148.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,025,405.20 : 1,538,107.80 = 315,432.10 : x
  2. Step 2: Convert to fraction form
    1,025,405.20/1,538,107.80 = 315,432.10/x
  3. Step 3: Cross multiply
    1,025,405.20x = 1,538,107.80 × 315,432.10
  4. Step 4: Simplify right side
    1,025,405.20x = 485,168,573,380.38
  5. Step 5: Solve for x
    x = 485,168,573,380.38/1,025,405.20
  6. Step 6: Final answer
    x = 473,148.15

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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.