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Finding the Fourth Proportional to 874.20, 1,302.30 and 848.70

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Solution

The fourth proportional to 874.20, 1,302.30 and 848.70 is: 1,264.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    874.20 : 1,302.30 = 848.70 : x
  2. Step 2: Convert to fraction form
    874.20/1,302.30 = 848.70/x
  3. Step 3: Cross multiply
    874.20x = 1,302.30 × 848.70
  4. Step 4: Simplify right side
    874.20x = 1,105,262.01
  5. Step 5: Solve for x
    x = 1,105,262.01/874.20
  6. Step 6: Final answer
    x = 1,264.31

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.