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Finding the Fourth Proportional to 929.48, 1,392.18 and 790.97

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Solution

The fourth proportional to 929.48, 1,392.18 and 790.97 is: 1,184.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    929.48 : 1,392.18 = 790.97 : x
  2. Step 2: Convert to fraction form
    929.48/1,392.18 = 790.97/x
  3. Step 3: Cross multiply
    929.48x = 1,392.18 × 790.97
  4. Step 4: Simplify right side
    929.48x = 1,101,172.61
  5. Step 5: Solve for x
    x = 1,101,172.61/929.48
  6. Step 6: Final answer
    x = 1,184.72

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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.