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Finding the Fourth Proportional to 1,653.25, 2,479.89 and 499

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Solution

The fourth proportional to 1,653.25, 2,479.89 and 499 is: 748.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,653.25 : 2,479.89 = 499 : x
  2. Step 2: Convert to fraction form
    1,653.25/2,479.89 = 499/x
  3. Step 3: Cross multiply
    1,653.25x = 2,479.89 × 499
  4. Step 4: Simplify right side
    1,653.25x = 1,237,465.11
  5. Step 5: Solve for x
    x = 1,237,465.11/1,653.25
  6. Step 6: Final answer
    x = 748.50

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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.