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Finding the Fourth Proportional to 403,613.04, 605,105.40 and 261,157.32

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Solution

The fourth proportional to 403,613.04, 605,105.40 and 261,157.32 is: 391,532.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,613.04 : 605,105.40 = 261,157.32 : x
  2. Step 2: Convert to fraction form
    403,613.04/605,105.40 = 261,157.32/x
  3. Step 3: Cross multiply
    403,613.04x = 605,105.40 × 261,157.32
  4. Step 4: Simplify right side
    403,613.04x = 158,027,704,581.53
  5. Step 5: Solve for x
    x = 158,027,704,581.53/403,613.04
  6. Step 6: Final answer
    x = 391,532.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.