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Finding the Fourth Proportional to 403,781.04, 553,182 and 388,646.88

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Solution

The fourth proportional to 403,781.04, 553,182 and 388,646.88 is: 532,448.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,781.04 : 553,182 = 388,646.88 : x
  2. Step 2: Convert to fraction form
    403,781.04/553,182 = 388,646.88/x
  3. Step 3: Cross multiply
    403,781.04x = 553,182 × 388,646.88
  4. Step 4: Simplify right side
    403,781.04x = 214,992,458,372.16
  5. Step 5: Solve for x
    x = 214,992,458,372.16/403,781.04
  6. Step 6: Final answer
    x = 532,448.13

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.