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Finding the Fourth Proportional to 458,225.80, 687,338.70 and 245,649.40

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Solution

The fourth proportional to 458,225.80, 687,338.70 and 245,649.40 is: 368,474.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,225.80 : 687,338.70 = 245,649.40 : x
  2. Step 2: Convert to fraction form
    458,225.80/687,338.70 = 245,649.40/x
  3. Step 3: Cross multiply
    458,225.80x = 687,338.70 × 245,649.40
  4. Step 4: Simplify right side
    458,225.80x = 168,844,339,251.78
  5. Step 5: Solve for x
    x = 168,844,339,251.78/458,225.80
  6. Step 6: Final answer
    x = 368,474.10

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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.