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Finding the Fourth Proportional to 1,079.73, 1,490.00 and 607.64

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Solution

The fourth proportional to 1,079.73, 1,490.00 and 607.64 is: 838.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,079.73 : 1,490.00 = 607.64 : x
  2. Step 2: Convert to fraction form
    1,079.73/1,490.00 = 607.64/x
  3. Step 3: Cross multiply
    1,079.73x = 1,490.00 × 607.64
  4. Step 4: Simplify right side
    1,079.73x = 905,373.11
  5. Step 5: Solve for x
    x = 905,373.11/1,079.73
  6. Step 6: Final answer
    x = 838.52

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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.