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Finding the Fourth Proportional to 712.10, 999.10 and 712.10

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Solution

The fourth proportional to 712.10, 999.10 and 712.10 is: 999.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    712.10 : 999.10 = 712.10 : x
  2. Step 2: Convert to fraction form
    712.10/999.10 = 712.10/x
  3. Step 3: Cross multiply
    712.10x = 999.10 × 712.10
  4. Step 4: Simplify right side
    712.10x = 711,459.11
  5. Step 5: Solve for x
    x = 711,459.11/712.10
  6. Step 6: Final answer
    x = 999.10

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.