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Finding the Fourth Proportional to 995.79, 1,493.72 and 556.80

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Solution

The fourth proportional to 995.79, 1,493.72 and 556.80 is: 835.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    995.79 : 1,493.72 = 556.80 : x
  2. Step 2: Convert to fraction form
    995.79/1,493.72 = 556.80/x
  3. Step 3: Cross multiply
    995.79x = 1,493.72 × 556.80
  4. Step 4: Simplify right side
    995.79x = 831,699.63
  5. Step 5: Solve for x
    x = 831,699.63/995.79
  6. Step 6: Final answer
    x = 835.21

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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.