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Finding the Fourth Proportional to 653, 900.33 and 431.45

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Solution

The fourth proportional to 653, 900.33 and 431.45 is: 594.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    653 : 900.33 = 431.45 : x
  2. Step 2: Convert to fraction form
    653/900.33 = 431.45/x
  3. Step 3: Cross multiply
    653x = 900.33 × 431.45
  4. Step 4: Simplify right side
    653x = 388,447.38
  5. Step 5: Solve for x
    x = 388,447.38/653
  6. Step 6: Final answer
    x = 594.87

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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.