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Finding the Fourth Proportional to 983.06, 1,474.86 and 875.60

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Solution

The fourth proportional to 983.06, 1,474.86 and 875.60 is: 1,313.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    983.06 : 1,474.86 = 875.60 : x
  2. Step 2: Convert to fraction form
    983.06/1,474.86 = 875.60/x
  3. Step 3: Cross multiply
    983.06x = 1,474.86 × 875.60
  4. Step 4: Simplify right side
    983.06x = 1,291,387.42
  5. Step 5: Solve for x
    x = 1,291,387.42/983.06
  6. Step 6: Final answer
    x = 1,313.64

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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.