Home / 1,511.02-2,085.43-921.89

Finding the Fourth Proportional to 1,511.02, 2,085.43 and 921.89

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Solution

The fourth proportional to 1,511.02, 2,085.43 and 921.89 is: 1,272.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,511.02 : 2,085.43 = 921.89 : x
  2. Step 2: Convert to fraction form
    1,511.02/2,085.43 = 921.89/x
  3. Step 3: Cross multiply
    1,511.02x = 2,085.43 × 921.89
  4. Step 4: Simplify right side
    1,511.02x = 1,922,541.70
  5. Step 5: Solve for x
    x = 1,922,541.70/1,511.02
  6. Step 6: Final answer
    x = 1,272.35

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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.