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Finding the Fourth Proportional to 1,528.68, 2,290.99 and 553.85

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Solution

The fourth proportional to 1,528.68, 2,290.99 and 553.85 is: 830.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,528.68 : 2,290.99 = 553.85 : x
  2. Step 2: Convert to fraction form
    1,528.68/2,290.99 = 553.85/x
  3. Step 3: Cross multiply
    1,528.68x = 2,290.99 × 553.85
  4. Step 4: Simplify right side
    1,528.68x = 1,268,864.81
  5. Step 5: Solve for x
    x = 1,268,864.81/1,528.68
  6. Step 6: Final answer
    x = 830.04

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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.