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Finding the Fourth Proportional to 1,068.90, 1,476.50 and 872.07

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Solution

The fourth proportional to 1,068.90, 1,476.50 and 872.07 is: 1,204.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,068.90 : 1,476.50 = 872.07 : x
  2. Step 2: Convert to fraction form
    1,068.90/1,476.50 = 872.07/x
  3. Step 3: Cross multiply
    1,068.90x = 1,476.50 × 872.07
  4. Step 4: Simplify right side
    1,068.90x = 1,287,606.99
  5. Step 5: Solve for x
    x = 1,287,606.99/1,068.90
  6. Step 6: Final answer
    x = 1,204.61

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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.