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Finding the Fourth Proportional to 653.11, 901.31 and 358.40

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Solution

The fourth proportional to 653.11, 901.31 and 358.40 is: 494.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    653.11 : 901.31 = 358.40 : x
  2. Step 2: Convert to fraction form
    653.11/901.31 = 358.40/x
  3. Step 3: Cross multiply
    653.11x = 901.31 × 358.40
  4. Step 4: Simplify right side
    653.11x = 323,023.21
  5. Step 5: Solve for x
    x = 323,023.21/653.11
  6. Step 6: Final answer
    x = 494.60

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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.