Home / 1,516.60-2,272.10-865.40

Finding the Fourth Proportional to 1,516.60, 2,272.10 and 865.40

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Solution

The fourth proportional to 1,516.60, 2,272.10 and 865.40 is: 1,296.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,516.60 : 2,272.10 = 865.40 : x
  2. Step 2: Convert to fraction form
    1,516.60/2,272.10 = 865.40/x
  3. Step 3: Cross multiply
    1,516.60x = 2,272.10 × 865.40
  4. Step 4: Simplify right side
    1,516.60x = 1,966,275.34
  5. Step 5: Solve for x
    x = 1,966,275.34/1,516.60
  6. Step 6: Final answer
    x = 1,296.50

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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.