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Finding the Fourth Proportional to 539,889.30, 745,053.15 and 310,560.48

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Solution

The fourth proportional to 539,889.30, 745,053.15 and 310,560.48 is: 428,576.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,889.30 : 745,053.15 = 310,560.48 : x
  2. Step 2: Convert to fraction form
    539,889.30/745,053.15 = 310,560.48/x
  3. Step 3: Cross multiply
    539,889.30x = 745,053.15 × 310,560.48
  4. Step 4: Simplify right side
    539,889.30x = 231,384,063,889.51
  5. Step 5: Solve for x
    x = 231,384,063,889.51/539,889.30
  6. Step 6: Final answer
    x = 428,576.87

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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.