Home / 1,680.65-2,319.43-972.74

Finding the Fourth Proportional to 1,680.65, 2,319.43 and 972.74

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Solution

The fourth proportional to 1,680.65, 2,319.43 and 972.74 is: 1,342.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,680.65 : 2,319.43 = 972.74 : x
  2. Step 2: Convert to fraction form
    1,680.65/2,319.43 = 972.74/x
  3. Step 3: Cross multiply
    1,680.65x = 2,319.43 × 972.74
  4. Step 4: Simplify right side
    1,680.65x = 2,256,202.34
  5. Step 5: Solve for x
    x = 2,256,202.34/1,680.65
  6. Step 6: Final answer
    x = 1,342.46

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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.