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Finding the Fourth Proportional to 653.19, 901.37 and 391.35

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Solution

The fourth proportional to 653.19, 901.37 and 391.35 is: 540.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    653.19 : 901.37 = 391.35 : x
  2. Step 2: Convert to fraction form
    653.19/901.37 = 391.35/x
  3. Step 3: Cross multiply
    653.19x = 901.37 × 391.35
  4. Step 4: Simplify right side
    653.19x = 352,751.15
  5. Step 5: Solve for x
    x = 352,751.15/653.19
  6. Step 6: Final answer
    x = 540.04

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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.