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Finding the Fourth Proportional to 571.55, 855.72 and 432.29

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Solution

The fourth proportional to 571.55, 855.72 and 432.29 is: 647.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    571.55 : 855.72 = 432.29 : x
  2. Step 2: Convert to fraction form
    571.55/855.72 = 432.29/x
  3. Step 3: Cross multiply
    571.55x = 855.72 × 432.29
  4. Step 4: Simplify right side
    571.55x = 369,914.92
  5. Step 5: Solve for x
    x = 369,914.92/571.55
  6. Step 6: Final answer
    x = 647.22

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.