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Finding the Fourth Proportional to 965.98, 1,332.64 and 572.79

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Solution

The fourth proportional to 965.98, 1,332.64 and 572.79 is: 790.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    965.98 : 1,332.64 = 572.79 : x
  2. Step 2: Convert to fraction form
    965.98/1,332.64 = 572.79/x
  3. Step 3: Cross multiply
    965.98x = 1,332.64 × 572.79
  4. Step 4: Simplify right side
    965.98x = 763,322.87
  5. Step 5: Solve for x
    x = 763,322.87/965.98
  6. Step 6: Final answer
    x = 790.21

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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.