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Finding the Fourth Proportional to 401,759.72, 554,341.80 and 231,895.43

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Solution

The fourth proportional to 401,759.72, 554,341.80 and 231,895.43 is: 319,965.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    401,759.72 : 554,341.80 = 231,895.43 : x
  2. Step 2: Convert to fraction form
    401,759.72/554,341.80 = 231,895.43/x
  3. Step 3: Cross multiply
    401,759.72x = 554,341.80 × 231,895.43
  4. Step 4: Simplify right side
    401,759.72x = 128,549,330,077.97
  5. Step 5: Solve for x
    x = 128,549,330,077.97/401,759.72
  6. Step 6: Final answer
    x = 319,965.70

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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.