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Finding the Fourth Proportional to 1,020.50, 1,528.26 and 873.38

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Solution

The fourth proportional to 1,020.50, 1,528.26 and 873.38 is: 1,307.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,020.50 : 1,528.26 = 873.38 : x
  2. Step 2: Convert to fraction form
    1,020.50/1,528.26 = 873.38/x
  3. Step 3: Cross multiply
    1,020.50x = 1,528.26 × 873.38
  4. Step 4: Simplify right side
    1,020.50x = 1,334,744.08
  5. Step 5: Solve for x
    x = 1,334,744.08/1,020.50
  6. Step 6: Final answer
    x = 1,307.94

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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.