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Finding the Fourth Proportional to 782.62, 1,173.57 and 371.50

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Solution

The fourth proportional to 782.62, 1,173.57 and 371.50 is: 557.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    782.62 : 1,173.57 = 371.50 : x
  2. Step 2: Convert to fraction form
    782.62/1,173.57 = 371.50/x
  3. Step 3: Cross multiply
    782.62x = 1,173.57 × 371.50
  4. Step 4: Simplify right side
    782.62x = 435,981.26
  5. Step 5: Solve for x
    x = 435,981.26/782.62
  6. Step 6: Final answer
    x = 557.08

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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.