Home / 1,511.52-2,085.30-921.66

Finding the Fourth Proportional to 1,511.52, 2,085.30 and 921.66

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Solution

The fourth proportional to 1,511.52, 2,085.30 and 921.66 is: 1,271.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,511.52 : 2,085.30 = 921.66 : x
  2. Step 2: Convert to fraction form
    1,511.52/2,085.30 = 921.66/x
  3. Step 3: Cross multiply
    1,511.52x = 2,085.30 × 921.66
  4. Step 4: Simplify right side
    1,511.52x = 1,921,937.60
  5. Step 5: Solve for x
    x = 1,921,937.60/1,511.52
  6. Step 6: Final answer
    x = 1,271.53

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1.5x scale

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.