Home / 1,515.16-2,090.64-885.66

Finding the Fourth Proportional to 1,515.16, 2,090.64 and 885.66

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Solution

The fourth proportional to 1,515.16, 2,090.64 and 885.66 is: 1,222.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,515.16 : 2,090.64 = 885.66 : x
  2. Step 2: Convert to fraction form
    1,515.16/2,090.64 = 885.66/x
  3. Step 3: Cross multiply
    1,515.16x = 2,090.64 × 885.66
  4. Step 4: Simplify right side
    1,515.16x = 1,851,596.22
  5. Step 5: Solve for x
    x = 1,851,596.22/1,515.16
  6. Step 6: Final answer
    x = 1,222.05

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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.