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Finding the Fourth Proportional to 722,164.92, 996,598.08 and 399,874.40

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Solution

The fourth proportional to 722,164.92, 996,598.08 and 399,874.40 is: 551,832.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,164.92 : 996,598.08 = 399,874.40 : x
  2. Step 2: Convert to fraction form
    722,164.92/996,598.08 = 399,874.40/x
  3. Step 3: Cross multiply
    722,164.92x = 996,598.08 × 399,874.40
  4. Step 4: Simplify right side
    722,164.92x = 398,514,059,281.15
  5. Step 5: Solve for x
    x = 398,514,059,281.15/722,164.92
  6. Step 6: Final answer
    x = 551,832.48

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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.