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Finding the Fourth Proportional to 723.42, 998.81 and 555.07

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Solution

The fourth proportional to 723.42, 998.81 and 555.07 is: 766.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    723.42 : 998.81 = 555.07 : x
  2. Step 2: Convert to fraction form
    723.42/998.81 = 555.07/x
  3. Step 3: Cross multiply
    723.42x = 998.81 × 555.07
  4. Step 4: Simplify right side
    723.42x = 554,404.19
  5. Step 5: Solve for x
    x = 554,404.19/723.42
  6. Step 6: Final answer
    x = 766.37

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1.5x scale

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.