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Finding the Fourth Proportional to 1,488.68, 2,054.30 and 825.50

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Solution

The fourth proportional to 1,488.68, 2,054.30 and 825.50 is: 1,139.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,488.68 : 2,054.30 = 825.50 : x
  2. Step 2: Convert to fraction form
    1,488.68/2,054.30 = 825.50/x
  3. Step 3: Cross multiply
    1,488.68x = 2,054.30 × 825.50
  4. Step 4: Simplify right side
    1,488.68x = 1,695,824.65
  5. Step 5: Solve for x
    x = 1,695,824.65/1,488.68
  6. Step 6: Final answer
    x = 1,139.15

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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.