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Finding the Fourth Proportional to 848.85, 1,272.03 and 539.91

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Solution

The fourth proportional to 848.85, 1,272.03 and 539.91 is: 809.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    848.85 : 1,272.03 = 539.91 : x
  2. Step 2: Convert to fraction form
    848.85/1,272.03 = 539.91/x
  3. Step 3: Cross multiply
    848.85x = 1,272.03 × 539.91
  4. Step 4: Simplify right side
    848.85x = 686,781.72
  5. Step 5: Solve for x
    x = 686,781.72/848.85
  6. Step 6: Final answer
    x = 809.07

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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.