Home / 1,511.61-2,085.66-921.93

Finding the Fourth Proportional to 1,511.61, 2,085.66 and 921.93

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Solution

The fourth proportional to 1,511.61, 2,085.66 and 921.93 is: 1,272.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,511.61 : 2,085.66 = 921.93 : x
  2. Step 2: Convert to fraction form
    1,511.61/2,085.66 = 921.93/x
  3. Step 3: Cross multiply
    1,511.61x = 2,085.66 × 921.93
  4. Step 4: Simplify right side
    1,511.61x = 1,922,832.52
  5. Step 5: Solve for x
    x = 1,922,832.52/1,511.61
  6. Step 6: Final answer
    x = 1,272.04

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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.