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Finding the Fourth Proportional to 1,132.54, 1,563.38 and 690.60

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Solution

The fourth proportional to 1,132.54, 1,563.38 and 690.60 is: 953.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,132.54 : 1,563.38 = 690.60 : x
  2. Step 2: Convert to fraction form
    1,132.54/1,563.38 = 690.60/x
  3. Step 3: Cross multiply
    1,132.54x = 1,563.38 × 690.60
  4. Step 4: Simplify right side
    1,132.54x = 1,079,670.23
  5. Step 5: Solve for x
    x = 1,079,670.23/1,132.54
  6. Step 6: Final answer
    x = 953.32

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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.