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Finding the Fourth Proportional to 653.46, 901.65 and 391.38

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Solution

The fourth proportional to 653.46, 901.65 and 391.38 is: 540.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    653.46 : 901.65 = 391.38 : x
  2. Step 2: Convert to fraction form
    653.46/901.65 = 391.38/x
  3. Step 3: Cross multiply
    653.46x = 901.65 × 391.38
  4. Step 4: Simplify right side
    653.46x = 352,887.78
  5. Step 5: Solve for x
    x = 352,887.78/653.46
  6. Step 6: Final answer
    x = 540.03

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Double scale
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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.