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Finding the Fourth Proportional to 403,718.58, 557,132.58 and 231,642.72

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Solution

The fourth proportional to 403,718.58, 557,132.58 and 231,642.72 is: 319,667.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,718.58 : 557,132.58 = 231,642.72 : x
  2. Step 2: Convert to fraction form
    403,718.58/557,132.58 = 231,642.72/x
  3. Step 3: Cross multiply
    403,718.58x = 557,132.58 × 231,642.72
  4. Step 4: Simplify right side
    403,718.58x = 129,055,706,231.82
  5. Step 5: Solve for x
    x = 129,055,706,231.82/403,718.58
  6. Step 6: Final answer
    x = 319,667.49

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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.