Home / 1,209.72-1,815.12-560.46

Finding the Fourth Proportional to 1,209.72, 1,815.12 and 560.46

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Solution

The fourth proportional to 1,209.72, 1,815.12 and 560.46 is: 840.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,209.72 : 1,815.12 = 560.46 : x
  2. Step 2: Convert to fraction form
    1,209.72/1,815.12 = 560.46/x
  3. Step 3: Cross multiply
    1,209.72x = 1,815.12 × 560.46
  4. Step 4: Simplify right side
    1,209.72x = 1,017,302.16
  5. Step 5: Solve for x
    x = 1,017,302.16/1,209.72
  6. Step 6: Final answer
    x = 840.94

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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.