Home / 1,680.52-2,319.26-981.76

Finding the Fourth Proportional to 1,680.52, 2,319.26 and 981.76

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Solution

The fourth proportional to 1,680.52, 2,319.26 and 981.76 is: 1,354.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,680.52 : 2,319.26 = 981.76 : x
  2. Step 2: Convert to fraction form
    1,680.52/2,319.26 = 981.76/x
  3. Step 3: Cross multiply
    1,680.52x = 2,319.26 × 981.76
  4. Step 4: Simplify right side
    1,680.52x = 2,276,956.70
  5. Step 5: Solve for x
    x = 2,276,956.70/1,680.52
  6. Step 6: Final answer
    x = 1,354.91

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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.