Home / 1,132.48-1,563.20-690.40

Finding the Fourth Proportional to 1,132.48, 1,563.20 and 690.40

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Solution

The fourth proportional to 1,132.48, 1,563.20 and 690.40 is: 952.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,132.48 : 1,563.20 = 690.40 : x
  2. Step 2: Convert to fraction form
    1,132.48/1,563.20 = 690.40/x
  3. Step 3: Cross multiply
    1,132.48x = 1,563.20 × 690.40
  4. Step 4: Simplify right side
    1,132.48x = 1,079,233.28
  5. Step 5: Solve for x
    x = 1,079,233.28/1,132.48
  6. Step 6: Final answer
    x = 952.98

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1.5x scale

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.