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Finding the Fourth Proportional to 983.49, 1,475.24 and 253.07

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Solution

The fourth proportional to 983.49, 1,475.24 and 253.07 is: 379.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    983.49 : 1,475.24 = 253.07 : x
  2. Step 2: Convert to fraction form
    983.49/1,475.24 = 253.07/x
  3. Step 3: Cross multiply
    983.49x = 1,475.24 × 253.07
  4. Step 4: Simplify right side
    983.49x = 373,330.35
  5. Step 5: Solve for x
    x = 373,330.35/983.49
  6. Step 6: Final answer
    x = 379.60

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Double scale
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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.