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Finding the Fourth Proportional to 648.80, 895.49 and 424.34

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Solution

The fourth proportional to 648.80, 895.49 and 424.34 is: 585.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    648.80 : 895.49 = 424.34 : x
  2. Step 2: Convert to fraction form
    648.80/895.49 = 424.34/x
  3. Step 3: Cross multiply
    648.80x = 895.49 × 424.34
  4. Step 4: Simplify right side
    648.80x = 379,985.63
  5. Step 5: Solve for x
    x = 379,985.63/648.80
  6. Step 6: Final answer
    x = 585.68

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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.