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Finding the Fourth Proportional to 630.90, 944.40 and 571.50

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Solution

The fourth proportional to 630.90, 944.40 and 571.50 is: 855.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    630.90 : 944.40 = 571.50 : x
  2. Step 2: Convert to fraction form
    630.90/944.40 = 571.50/x
  3. Step 3: Cross multiply
    630.90x = 944.40 × 571.50
  4. Step 4: Simplify right side
    630.90x = 539,719.88
  5. Step 5: Solve for x
    x = 539,719.88/630.90
  6. Step 6: Final answer
    x = 855.48

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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.