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Finding the Fourth Proportional to 648.90, 973.49 and 283.70

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Solution

The fourth proportional to 648.90, 973.49 and 283.70 is: 425.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    648.90 : 973.49 = 283.70 : x
  2. Step 2: Convert to fraction form
    648.90/973.49 = 283.70/x
  3. Step 3: Cross multiply
    648.90x = 973.49 × 283.70
  4. Step 4: Simplify right side
    648.90x = 276,172.83
  5. Step 5: Solve for x
    x = 276,172.83/648.90
  6. Step 6: Final answer
    x = 425.60

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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.