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Finding the Fourth Proportional to 1,167.76, 1,751.30 and 619.65

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Solution

The fourth proportional to 1,167.76, 1,751.30 and 619.65 is: 929.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,167.76 : 1,751.30 = 619.65 : x
  2. Step 2: Convert to fraction form
    1,167.76/1,751.30 = 619.65/x
  3. Step 3: Cross multiply
    1,167.76x = 1,751.30 × 619.65
  4. Step 4: Simplify right side
    1,167.76x = 1,085,192.27
  5. Step 5: Solve for x
    x = 1,085,192.27/1,167.76
  6. Step 6: Final answer
    x = 929.29

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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.