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Finding the Fourth Proportional to 723.45, 992.50 and 688.60

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Solution

The fourth proportional to 723.45, 992.50 and 688.60 is: 944.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    723.45 : 992.50 = 688.60 : x
  2. Step 2: Convert to fraction form
    723.45/992.50 = 688.60/x
  3. Step 3: Cross multiply
    723.45x = 992.50 × 688.60
  4. Step 4: Simplify right side
    723.45x = 683,435.50
  5. Step 5: Solve for x
    x = 683,435.50/723.45
  6. Step 6: Final answer
    x = 944.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.