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Finding the Fourth Proportional to 1,279.51, 1,917.76 and 732.07

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Solution

The fourth proportional to 1,279.51, 1,917.76 and 732.07 is: 1,097.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,279.51 : 1,917.76 = 732.07 : x
  2. Step 2: Convert to fraction form
    1,279.51/1,917.76 = 732.07/x
  3. Step 3: Cross multiply
    1,279.51x = 1,917.76 × 732.07
  4. Step 4: Simplify right side
    1,279.51x = 1,403,934.56
  5. Step 5: Solve for x
    x = 1,403,934.56/1,279.51
  6. Step 6: Final answer
    x = 1,097.24

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1.5x scale

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.