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Finding the Fourth Proportional to 723,290.40, 998,199.90 and 401,101.56

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Solution

The fourth proportional to 723,290.40, 998,199.90 and 401,101.56 is: 553,552.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    723,290.40 : 998,199.90 = 401,101.56 : x
  2. Step 2: Convert to fraction form
    723,290.40/998,199.90 = 401,101.56/x
  3. Step 3: Cross multiply
    723,290.40x = 998,199.90 × 401,101.56
  4. Step 4: Simplify right side
    723,290.40x = 400,379,537,081.84
  5. Step 5: Solve for x
    x = 400,379,537,081.84/723,290.40
  6. Step 6: Final answer
    x = 553,552.95

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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.