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Finding the Fourth Proportional to 904.65, 1,354.95 and 660.44

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Solution

The fourth proportional to 904.65, 1,354.95 and 660.44 is: 989.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    904.65 : 1,354.95 = 660.44 : x
  2. Step 2: Convert to fraction form
    904.65/1,354.95 = 660.44/x
  3. Step 3: Cross multiply
    904.65x = 1,354.95 × 660.44
  4. Step 4: Simplify right side
    904.65x = 894,856.40
  5. Step 5: Solve for x
    x = 894,856.40/904.65
  6. Step 6: Final answer
    x = 989.17

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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.