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Finding the Fourth Proportional to 2,872.89, 4,309.74 and 924.64

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Solution

The fourth proportional to 2,872.89, 4,309.74 and 924.64 is: 1,387.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,872.89 : 4,309.74 = 924.64 : x
  2. Step 2: Convert to fraction form
    2,872.89/4,309.74 = 924.64/x
  3. Step 3: Cross multiply
    2,872.89x = 4,309.74 × 924.64
  4. Step 4: Simplify right side
    2,872.89x = 3,984,931.82
  5. Step 5: Solve for x
    x = 3,984,931.82/2,872.89
  6. Step 6: Final answer
    x = 1,387.08

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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.