Home / 1,528.29-2,291.66-747.12

Finding the Fourth Proportional to 1,528.29, 2,291.66 and 747.12

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Solution

The fourth proportional to 1,528.29, 2,291.66 and 747.12 is: 1,120.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,528.29 : 2,291.66 = 747.12 : x
  2. Step 2: Convert to fraction form
    1,528.29/2,291.66 = 747.12/x
  3. Step 3: Cross multiply
    1,528.29x = 2,291.66 × 747.12
  4. Step 4: Simplify right side
    1,528.29x = 1,712,146.89
  5. Step 5: Solve for x
    x = 1,712,146.89/1,528.29
  6. Step 6: Final answer
    x = 1,120.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.