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Finding the Fourth Proportional to 1,132.80, 1,563.36 and 870.32

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Solution

The fourth proportional to 1,132.80, 1,563.36 and 870.32 is: 1,201.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,132.80 : 1,563.36 = 870.32 : x
  2. Step 2: Convert to fraction form
    1,132.80/1,563.36 = 870.32/x
  3. Step 3: Cross multiply
    1,132.80x = 1,563.36 × 870.32
  4. Step 4: Simplify right side
    1,132.80x = 1,360,623.48
  5. Step 5: Solve for x
    x = 1,360,623.48/1,132.80
  6. Step 6: Final answer
    x = 1,201.12

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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.