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Finding the Fourth Proportional to 924.82, 1,276.80 and 688.48

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Solution

The fourth proportional to 924.82, 1,276.80 and 688.48 is: 950.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    924.82 : 1,276.80 = 688.48 : x
  2. Step 2: Convert to fraction form
    924.82/1,276.80 = 688.48/x
  3. Step 3: Cross multiply
    924.82x = 1,276.80 × 688.48
  4. Step 4: Simplify right side
    924.82x = 879,051.26
  5. Step 5: Solve for x
    x = 879,051.26/924.82
  6. Step 6: Final answer
    x = 950.51

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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.