Home / 1,511.07-2,085.35-847.90

Finding the Fourth Proportional to 1,511.07, 2,085.35 and 847.90

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Solution

The fourth proportional to 1,511.07, 2,085.35 and 847.90 is: 1,170.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,511.07 : 2,085.35 = 847.90 : x
  2. Step 2: Convert to fraction form
    1,511.07/2,085.35 = 847.90/x
  3. Step 3: Cross multiply
    1,511.07x = 2,085.35 × 847.90
  4. Step 4: Simplify right side
    1,511.07x = 1,768,168.27
  5. Step 5: Solve for x
    x = 1,768,168.27/1,511.07
  6. Step 6: Final answer
    x = 1,170.14

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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.