Home / 1,265.52-1,897.20-485.08

Finding the Fourth Proportional to 1,265.52, 1,897.20 and 485.08

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Solution

The fourth proportional to 1,265.52, 1,897.20 and 485.08 is: 727.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,265.52 : 1,897.20 = 485.08 : x
  2. Step 2: Convert to fraction form
    1,265.52/1,897.20 = 485.08/x
  3. Step 3: Cross multiply
    1,265.52x = 1,897.20 × 485.08
  4. Step 4: Simplify right side
    1,265.52x = 920,293.78
  5. Step 5: Solve for x
    x = 920,293.78/1,265.52
  6. Step 6: Final answer
    x = 727.21

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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.