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Finding the Fourth Proportional to 1,788.16, 2,681.92 and 634.24

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Solution

The fourth proportional to 1,788.16, 2,681.92 and 634.24 is: 951.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,788.16 : 2,681.92 = 634.24 : x
  2. Step 2: Convert to fraction form
    1,788.16/2,681.92 = 634.24/x
  3. Step 3: Cross multiply
    1,788.16x = 2,681.92 × 634.24
  4. Step 4: Simplify right side
    1,788.16x = 1,700,980.94
  5. Step 5: Solve for x
    x = 1,700,980.94/1,788.16
  6. Step 6: Final answer
    x = 951.25

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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.