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Finding the Fourth Proportional to 487,311.47, 672,311.36 and 293,761.97

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Solution

The fourth proportional to 487,311.47, 672,311.36 and 293,761.97 is: 405,283.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,311.47 : 672,311.36 = 293,761.97 : x
  2. Step 2: Convert to fraction form
    487,311.47/672,311.36 = 293,761.97/x
  3. Step 3: Cross multiply
    487,311.47x = 672,311.36 × 293,761.97
  4. Step 4: Simplify right side
    487,311.47x = 197,499,509,566.98
  5. Step 5: Solve for x
    x = 197,499,509,566.98/487,311.47
  6. Step 6: Final answer
    x = 405,283.93

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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.