Home / 1,530.24-2,111.68-908.80

Finding the Fourth Proportional to 1,530.24, 2,111.68 and 908.80

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Solution

The fourth proportional to 1,530.24, 2,111.68 and 908.80 is: 1,254.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,530.24 : 2,111.68 = 908.80 : x
  2. Step 2: Convert to fraction form
    1,530.24/2,111.68 = 908.80/x
  3. Step 3: Cross multiply
    1,530.24x = 2,111.68 × 908.80
  4. Step 4: Simplify right side
    1,530.24x = 1,919,094.78
  5. Step 5: Solve for x
    x = 1,919,094.78/1,530.24
  6. Step 6: Final answer
    x = 1,254.11

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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.