Home / 721,746.76-996,012.66-399,479.24

Finding the Fourth Proportional to 721,746.76, 996,012.66 and 399,479.24

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Solution

The fourth proportional to 721,746.76, 996,012.66 and 399,479.24 is: 551,282.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,746.76 : 996,012.66 = 399,479.24 : x
  2. Step 2: Convert to fraction form
    721,746.76/996,012.66 = 399,479.24/x
  3. Step 3: Cross multiply
    721,746.76x = 996,012.66 × 399,479.24
  4. Step 4: Simplify right side
    721,746.76x = 397,886,380,447.18
  5. Step 5: Solve for x
    x = 397,886,380,447.18/721,746.76
  6. Step 6: Final answer
    x = 551,282.53

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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.