Home / 1,680.57-2,319.30-972.56

Finding the Fourth Proportional to 1,680.57, 2,319.30 and 972.56

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Solution

The fourth proportional to 1,680.57, 2,319.30 and 972.56 is: 1,342.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,680.57 : 2,319.30 = 972.56 : x
  2. Step 2: Convert to fraction form
    1,680.57/2,319.30 = 972.56/x
  3. Step 3: Cross multiply
    1,680.57x = 2,319.30 × 972.56
  4. Step 4: Simplify right side
    1,680.57x = 2,255,646.81
  5. Step 5: Solve for x
    x = 2,255,646.81/1,680.57
  6. Step 6: Final answer
    x = 1,342.19

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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.