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Finding the Fourth Proportional to 723,296.39, 998,147.36 and 400,998.20

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Solution

The fourth proportional to 723,296.39, 998,147.36 and 400,998.20 is: 553,376.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    723,296.39 : 998,147.36 = 400,998.20 : x
  2. Step 2: Convert to fraction form
    723,296.39/998,147.36 = 400,998.20/x
  3. Step 3: Cross multiply
    723,296.39x = 998,147.36 × 400,998.20
  4. Step 4: Simplify right side
    723,296.39x = 400,255,290,706.51
  5. Step 5: Solve for x
    x = 400,255,290,706.51/723,296.39
  6. Step 6: Final answer
    x = 553,376.59

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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.