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Finding the Fourth Proportional to 926.73, 1,390.86 and 488.14

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Solution

The fourth proportional to 926.73, 1,390.86 and 488.14 is: 732.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    926.73 : 1,390.86 = 488.14 : x
  2. Step 2: Convert to fraction form
    926.73/1,390.86 = 488.14/x
  3. Step 3: Cross multiply
    926.73x = 1,390.86 × 488.14
  4. Step 4: Simplify right side
    926.73x = 678,927.45
  5. Step 5: Solve for x
    x = 678,927.45/926.73
  6. Step 6: Final answer
    x = 732.61

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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.