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Finding the Fourth Proportional to 848.79, 1,171.44 and 499.50

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Solution

The fourth proportional to 848.79, 1,171.44 and 499.50 is: 689.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    848.79 : 1,171.44 = 499.50 : x
  2. Step 2: Convert to fraction form
    848.79/1,171.44 = 499.50/x
  3. Step 3: Cross multiply
    848.79x = 1,171.44 × 499.50
  4. Step 4: Simplify right side
    848.79x = 585,134.28
  5. Step 5: Solve for x
    x = 585,134.28/848.79
  6. Step 6: Final answer
    x = 689.37

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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.