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Finding the Fourth Proportional to 653.40, 901.36 and 443.32

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Solution

The fourth proportional to 653.40, 901.36 and 443.32 is: 611.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    653.40 : 901.36 = 443.32 : x
  2. Step 2: Convert to fraction form
    653.40/901.36 = 443.32/x
  3. Step 3: Cross multiply
    653.40x = 901.36 × 443.32
  4. Step 4: Simplify right side
    653.40x = 399,590.92
  5. Step 5: Solve for x
    x = 399,590.92/653.40
  6. Step 6: Final answer
    x = 611.56

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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.