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Finding the Fourth Proportional to 1,470.85, 2,203.03 and 981.61

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Solution

The fourth proportional to 1,470.85, 2,203.03 and 981.61 is: 1,470.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,470.85 : 2,203.03 = 981.61 : x
  2. Step 2: Convert to fraction form
    1,470.85/2,203.03 = 981.61/x
  3. Step 3: Cross multiply
    1,470.85x = 2,203.03 × 981.61
  4. Step 4: Simplify right side
    1,470.85x = 2,162,516.28
  5. Step 5: Solve for x
    x = 2,162,516.28/1,470.85
  6. Step 6: Final answer
    x = 1,470.25

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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.