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Finding the Fourth Proportional to 619.65, 931.30 and 552.22

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Solution

The fourth proportional to 619.65, 931.30 and 552.22 is: 829.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    619.65 : 931.30 = 552.22 : x
  2. Step 2: Convert to fraction form
    619.65/931.30 = 552.22/x
  3. Step 3: Cross multiply
    619.65x = 931.30 × 552.22
  4. Step 4: Simplify right side
    619.65x = 514,278.78
  5. Step 5: Solve for x
    x = 514,278.78/619.65
  6. Step 6: Final answer
    x = 829.95

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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.