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Finding the Fourth Proportional to 1,211.04, 1,671.20 and 659.04

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Solution

The fourth proportional to 1,211.04, 1,671.20 and 659.04 is: 909.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,211.04 : 1,671.20 = 659.04 : x
  2. Step 2: Convert to fraction form
    1,211.04/1,671.20 = 659.04/x
  3. Step 3: Cross multiply
    1,211.04x = 1,671.20 × 659.04
  4. Step 4: Simplify right side
    1,211.04x = 1,101,387.65
  5. Step 5: Solve for x
    x = 1,101,387.65/1,211.04
  6. Step 6: Final answer
    x = 909.46

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.