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Finding the Fourth Proportional to 1,080.16, 1,490.46 and 607.96

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Solution

The fourth proportional to 1,080.16, 1,490.46 and 607.96 is: 838.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,080.16 : 1,490.46 = 607.96 : x
  2. Step 2: Convert to fraction form
    1,080.16/1,490.46 = 607.96/x
  3. Step 3: Cross multiply
    1,080.16x = 1,490.46 × 607.96
  4. Step 4: Simplify right side
    1,080.16x = 906,140.06
  5. Step 5: Solve for x
    x = 906,140.06/1,080.16
  6. Step 6: Final answer
    x = 838.89

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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.