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Finding the Fourth Proportional to 1,648.73, 2,473.56 and 918.83

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Solution

The fourth proportional to 1,648.73, 2,473.56 and 918.83 is: 1,378.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,648.73 : 2,473.56 = 918.83 : x
  2. Step 2: Convert to fraction form
    1,648.73/2,473.56 = 918.83/x
  3. Step 3: Cross multiply
    1,648.73x = 2,473.56 × 918.83
  4. Step 4: Simplify right side
    1,648.73x = 2,272,781.13
  5. Step 5: Solve for x
    x = 2,272,781.13/1,648.73
  6. Step 6: Final answer
    x = 1,378.50

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1.5x scale

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.