Home / 1,015.18-1,401.21-910.08

Finding the Fourth Proportional to 1,015.18, 1,401.21 and 910.08

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Solution

The fourth proportional to 1,015.18, 1,401.21 and 910.08 is: 1,256.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,015.18 : 1,401.21 = 910.08 : x
  2. Step 2: Convert to fraction form
    1,015.18/1,401.21 = 910.08/x
  3. Step 3: Cross multiply
    1,015.18x = 1,401.21 × 910.08
  4. Step 4: Simplify right side
    1,015.18x = 1,275,213.20
  5. Step 5: Solve for x
    x = 1,275,213.20/1,015.18
  6. Step 6: Final answer
    x = 1,256.15

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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.