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Finding the Fourth Proportional to 540,279.64, 745,614.60 and 310,871.78

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Solution

The fourth proportional to 540,279.64, 745,614.60 and 310,871.78 is: 429,019.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    540,279.64 : 745,614.60 = 310,871.78 : x
  2. Step 2: Convert to fraction form
    540,279.64/745,614.60 = 310,871.78/x
  3. Step 3: Cross multiply
    540,279.64x = 745,614.60 × 310,871.78
  4. Step 4: Simplify right side
    540,279.64x = 231,790,539,760.02
  5. Step 5: Solve for x
    x = 231,790,539,760.02/540,279.64
  6. Step 6: Final answer
    x = 429,019.57

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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.