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Finding the Fourth Proportional to 907.10, 1,358.67 and 489.34

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Solution

The fourth proportional to 907.10, 1,358.67 and 489.34 is: 732.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    907.10 : 1,358.67 = 489.34 : x
  2. Step 2: Convert to fraction form
    907.10/1,358.67 = 489.34/x
  3. Step 3: Cross multiply
    907.10x = 1,358.67 × 489.34
  4. Step 4: Simplify right side
    907.10x = 664,855.11
  5. Step 5: Solve for x
    x = 664,855.11/907.10
  6. Step 6: Final answer
    x = 732.95

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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.