Home / 1,217.52-1,680.14-693.50

Finding the Fourth Proportional to 1,217.52, 1,680.14 and 693.50

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Solution

The fourth proportional to 1,217.52, 1,680.14 and 693.50 is: 957.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,217.52 : 1,680.14 = 693.50 : x
  2. Step 2: Convert to fraction form
    1,217.52/1,680.14 = 693.50/x
  3. Step 3: Cross multiply
    1,217.52x = 1,680.14 × 693.50
  4. Step 4: Simplify right side
    1,217.52x = 1,165,177.09
  5. Step 5: Solve for x
    x = 1,165,177.09/1,217.52
  6. Step 6: Final answer
    x = 957.01

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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.