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Finding the Fourth Proportional to 1,527.88, 2,290.45 and 553.76

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Solution

The fourth proportional to 1,527.88, 2,290.45 and 553.76 is: 830.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,527.88 : 2,290.45 = 553.76 : x
  2. Step 2: Convert to fraction form
    1,527.88/2,290.45 = 553.76/x
  3. Step 3: Cross multiply
    1,527.88x = 2,290.45 × 553.76
  4. Step 4: Simplify right side
    1,527.88x = 1,268,359.59
  5. Step 5: Solve for x
    x = 1,268,359.59/1,527.88
  6. Step 6: Final answer
    x = 830.14

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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.