Home / 1,515.17-2,090.08-885.56

Finding the Fourth Proportional to 1,515.17, 2,090.08 and 885.56

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Solution

The fourth proportional to 1,515.17, 2,090.08 and 885.56 is: 1,221.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,515.17 : 2,090.08 = 885.56 : x
  2. Step 2: Convert to fraction form
    1,515.17/2,090.08 = 885.56/x
  3. Step 3: Cross multiply
    1,515.17x = 2,090.08 × 885.56
  4. Step 4: Simplify right side
    1,515.17x = 1,850,886.82
  5. Step 5: Solve for x
    x = 1,850,886.82/1,515.17
  6. Step 6: Final answer
    x = 1,221.57

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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.