Home / 1,528.08-2,291.42-487.74

Finding the Fourth Proportional to 1,528.08, 2,291.42 and 487.74

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Solution

The fourth proportional to 1,528.08, 2,291.42 and 487.74 is: 731.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,528.08 : 2,291.42 = 487.74 : x
  2. Step 2: Convert to fraction form
    1,528.08/2,291.42 = 487.74/x
  3. Step 3: Cross multiply
    1,528.08x = 2,291.42 × 487.74
  4. Step 4: Simplify right side
    1,528.08x = 1,117,617.19
  5. Step 5: Solve for x
    x = 1,117,617.19/1,528.08
  6. Step 6: Final answer
    x = 731.39

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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.