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Finding the Fourth Proportional to 929.36, 1,388.98 and 734.96

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Solution

The fourth proportional to 929.36, 1,388.98 and 734.96 is: 1,098.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    929.36 : 1,388.98 = 734.96 : x
  2. Step 2: Convert to fraction form
    929.36/1,388.98 = 734.96/x
  3. Step 3: Cross multiply
    929.36x = 1,388.98 × 734.96
  4. Step 4: Simplify right side
    929.36x = 1,020,844.74
  5. Step 5: Solve for x
    x = 1,020,844.74/929.36
  6. Step 6: Final answer
    x = 1,098.44

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.