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Finding the Fourth Proportional to 1,239.52, 1,711 and 846.28

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Solution

The fourth proportional to 1,239.52, 1,711 and 846.28 is: 1,168.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,239.52 : 1,711 = 846.28 : x
  2. Step 2: Convert to fraction form
    1,239.52/1,711 = 846.28/x
  3. Step 3: Cross multiply
    1,239.52x = 1,711 × 846.28
  4. Step 4: Simplify right side
    1,239.52x = 1,447,985.08
  5. Step 5: Solve for x
    x = 1,447,985.08/1,239.52
  6. Step 6: Final answer
    x = 1,168.18

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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.