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Finding the Fourth Proportional to 1,643.61, 2,464.48 and 547.39

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Solution

The fourth proportional to 1,643.61, 2,464.48 and 547.39 is: 820.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,643.61 : 2,464.48 = 547.39 : x
  2. Step 2: Convert to fraction form
    1,643.61/2,464.48 = 547.39/x
  3. Step 3: Cross multiply
    1,643.61x = 2,464.48 × 547.39
  4. Step 4: Simplify right side
    1,643.61x = 1,349,031.71
  5. Step 5: Solve for x
    x = 1,349,031.71/1,643.61
  6. Step 6: Final answer
    x = 820.77

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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.