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Finding the Fourth Proportional to 1,237.92, 1,857.68 and 914.08

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Solution

The fourth proportional to 1,237.92, 1,857.68 and 914.08 is: 1,371.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,237.92 : 1,857.68 = 914.08 : x
  2. Step 2: Convert to fraction form
    1,237.92/1,857.68 = 914.08/x
  3. Step 3: Cross multiply
    1,237.92x = 1,857.68 × 914.08
  4. Step 4: Simplify right side
    1,237.92x = 1,698,068.13
  5. Step 5: Solve for x
    x = 1,698,068.13/1,237.92
  6. Step 6: Final answer
    x = 1,371.71

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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.