Home / 1,515.02-2,090.68-851.90

Finding the Fourth Proportional to 1,515.02, 2,090.68 and 851.90

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Solution

The fourth proportional to 1,515.02, 2,090.68 and 851.90 is: 1,175.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,515.02 : 2,090.68 = 851.90 : x
  2. Step 2: Convert to fraction form
    1,515.02/2,090.68 = 851.90/x
  3. Step 3: Cross multiply
    1,515.02x = 2,090.68 × 851.90
  4. Step 4: Simplify right side
    1,515.02x = 1,781,050.29
  5. Step 5: Solve for x
    x = 1,781,050.29/1,515.02
  6. Step 6: Final answer
    x = 1,175.60

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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.