Home / 1,528.65-2,109.18-865.35

Finding the Fourth Proportional to 1,528.65, 2,109.18 and 865.35

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Solution

The fourth proportional to 1,528.65, 2,109.18 and 865.35 is: 1,193.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,528.65 : 2,109.18 = 865.35 : x
  2. Step 2: Convert to fraction form
    1,528.65/2,109.18 = 865.35/x
  3. Step 3: Cross multiply
    1,528.65x = 2,109.18 × 865.35
  4. Step 4: Simplify right side
    1,528.65x = 1,825,178.91
  5. Step 5: Solve for x
    x = 1,825,178.91/1,528.65
  6. Step 6: Final answer
    x = 1,193.98

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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.