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Finding the Fourth Proportional to 1,526.88, 2,289.96 and 553.20

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Solution

The fourth proportional to 1,526.88, 2,289.96 and 553.20 is: 829.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,526.88 : 2,289.96 = 553.20 : x
  2. Step 2: Convert to fraction form
    1,526.88/2,289.96 = 553.20/x
  3. Step 3: Cross multiply
    1,526.88x = 2,289.96 × 553.20
  4. Step 4: Simplify right side
    1,526.88x = 1,266,805.87
  5. Step 5: Solve for x
    x = 1,266,805.87/1,526.88
  6. Step 6: Final answer
    x = 829.67

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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.