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Finding the Fourth Proportional to 1,607.65, 2,218.31 and 935.61

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Solution

The fourth proportional to 1,607.65, 2,218.31 and 935.61 is: 1,291.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,607.65 : 2,218.31 = 935.61 : x
  2. Step 2: Convert to fraction form
    1,607.65/2,218.31 = 935.61/x
  3. Step 3: Cross multiply
    1,607.65x = 2,218.31 × 935.61
  4. Step 4: Simplify right side
    1,607.65x = 2,075,473.02
  5. Step 5: Solve for x
    x = 2,075,473.02/1,607.65
  6. Step 6: Final answer
    x = 1,291.00

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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.