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Finding the Fourth Proportional to 1,511.54, 2,085.18 and 951.38

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Solution

The fourth proportional to 1,511.54, 2,085.18 and 951.38 is: 1,312.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,511.54 : 2,085.18 = 951.38 : x
  2. Step 2: Convert to fraction form
    1,511.54/2,085.18 = 951.38/x
  3. Step 3: Cross multiply
    1,511.54x = 2,085.18 × 951.38
  4. Step 4: Simplify right side
    1,511.54x = 1,983,798.55
  5. Step 5: Solve for x
    x = 1,983,798.55/1,511.54
  6. Step 6: Final answer
    x = 1,312.44

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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.