Home / 723,019.60-997,764.68-396,340.56

Finding the Fourth Proportional to 723,019.60, 997,764.68 and 396,340.56

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Solution

The fourth proportional to 723,019.60, 997,764.68 and 396,340.56 is: 546,948.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    723,019.60 : 997,764.68 = 396,340.56 : x
  2. Step 2: Convert to fraction form
    723,019.60/997,764.68 = 396,340.56/x
  3. Step 3: Cross multiply
    723,019.60x = 997,764.68 × 396,340.56
  4. Step 4: Simplify right side
    723,019.60x = 395,454,612,019.42
  5. Step 5: Solve for x
    x = 395,454,612,019.42/723,019.60
  6. Step 6: Final answer
    x = 546,948.67

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Half scale
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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.