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Finding the Fourth Proportional to 1,167.70, 1,750.31 and 619.32

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Solution

The fourth proportional to 1,167.70, 1,750.31 and 619.32 is: 928.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,167.70 : 1,750.31 = 619.32 : x
  2. Step 2: Convert to fraction form
    1,167.70/1,750.31 = 619.32/x
  3. Step 3: Cross multiply
    1,167.70x = 1,750.31 × 619.32
  4. Step 4: Simplify right side
    1,167.70x = 1,084,001.99
  5. Step 5: Solve for x
    x = 1,084,001.99/1,167.70
  6. Step 6: Final answer
    x = 928.32

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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.