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Finding the Fourth Proportional to 882.50, 1,217.73 and 509.39

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Solution

The fourth proportional to 882.50, 1,217.73 and 509.39 is: 702.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    882.50 : 1,217.73 = 509.39 : x
  2. Step 2: Convert to fraction form
    882.50/1,217.73 = 509.39/x
  3. Step 3: Cross multiply
    882.50x = 1,217.73 × 509.39
  4. Step 4: Simplify right side
    882.50x = 620,299.87
  5. Step 5: Solve for x
    x = 620,299.87/882.50
  6. Step 6: Final answer
    x = 702.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.