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Finding the Fourth Proportional to 1,080.72, 1,621.18 and 560.96

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Solution

The fourth proportional to 1,080.72, 1,621.18 and 560.96 is: 841.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,080.72 : 1,621.18 = 560.96 : x
  2. Step 2: Convert to fraction form
    1,080.72/1,621.18 = 560.96/x
  3. Step 3: Cross multiply
    1,080.72x = 1,621.18 × 560.96
  4. Step 4: Simplify right side
    1,080.72x = 909,417.13
  5. Step 5: Solve for x
    x = 909,417.13/1,080.72
  6. Step 6: Final answer
    x = 841.49

Related Problems

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.