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Finding the Fourth Proportional to 838.88, 1,257.40 and 473.93

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Solution

The fourth proportional to 838.88, 1,257.40 and 473.93 is: 710.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    838.88 : 1,257.40 = 473.93 : x
  2. Step 2: Convert to fraction form
    838.88/1,257.40 = 473.93/x
  3. Step 3: Cross multiply
    838.88x = 1,257.40 × 473.93
  4. Step 4: Simplify right side
    838.88x = 595,910.93
  5. Step 5: Solve for x
    x = 595,910.93/838.88
  6. Step 6: Final answer
    x = 710.37

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.