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Finding the Fourth Proportional to 1,607.73, 2,218.71 and 909.12

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Solution

The fourth proportional to 1,607.73, 2,218.71 and 909.12 is: 1,254.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,607.73 : 2,218.71 = 909.12 : x
  2. Step 2: Convert to fraction form
    1,607.73/2,218.71 = 909.12/x
  3. Step 3: Cross multiply
    1,607.73x = 2,218.71 × 909.12
  4. Step 4: Simplify right side
    1,607.73x = 2,017,073.64
  5. Step 5: Solve for x
    x = 2,017,073.64/1,607.73
  6. Step 6: Final answer
    x = 1,254.61

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