Home / 723,115.80-997,971.38-400,888.19

Finding the Fourth Proportional to 723,115.80, 997,971.38 and 400,888.19

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Solution

The fourth proportional to 723,115.80, 997,971.38 and 400,888.19 is: 553,265.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    723,115.80 : 997,971.38 = 400,888.19 : x
  2. Step 2: Convert to fraction form
    723,115.80/997,971.38 = 400,888.19/x
  3. Step 3: Cross multiply
    723,115.80x = 997,971.38 × 400,888.19
  4. Step 4: Simplify right side
    723,115.80x = 400,074,933,205.70
  5. Step 5: Solve for x
    x = 400,074,933,205.70/723,115.80
  6. Step 6: Final answer
    x = 553,265.37

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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.