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Finding the Fourth Proportional to 1,785.58, 2,678.38 and 631.33

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Solution

The fourth proportional to 1,785.58, 2,678.38 and 631.33 is: 947.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,785.58 : 2,678.38 = 631.33 : x
  2. Step 2: Convert to fraction form
    1,785.58/2,678.38 = 631.33/x
  3. Step 3: Cross multiply
    1,785.58x = 2,678.38 × 631.33
  4. Step 4: Simplify right side
    1,785.58x = 1,690,941.65
  5. Step 5: Solve for x
    x = 1,690,941.65/1,785.58
  6. Step 6: Final answer
    x = 947.00

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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.