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Finding the Fourth Proportional to 1,080.56, 1,490.36 and 706.94

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Solution

The fourth proportional to 1,080.56, 1,490.36 and 706.94 is: 975.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,080.56 : 1,490.36 = 706.94 : x
  2. Step 2: Convert to fraction form
    1,080.56/1,490.36 = 706.94/x
  3. Step 3: Cross multiply
    1,080.56x = 1,490.36 × 706.94
  4. Step 4: Simplify right side
    1,080.56x = 1,053,595.10
  5. Step 5: Solve for x
    x = 1,053,595.10/1,080.56
  6. Step 6: Final answer
    x = 975.05

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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.