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Finding the Fourth Proportional to 983.55, 1,475.72 and 632.55

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Solution

The fourth proportional to 983.55, 1,475.72 and 632.55 is: 949.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    983.55 : 1,475.72 = 632.55 : x
  2. Step 2: Convert to fraction form
    983.55/1,475.72 = 632.55/x
  3. Step 3: Cross multiply
    983.55x = 1,475.72 × 632.55
  4. Step 4: Simplify right side
    983.55x = 933,466.69
  5. Step 5: Solve for x
    x = 933,466.69/983.55
  6. Step 6: Final answer
    x = 949.08

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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.