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Finding the Fourth Proportional to 719.03, 991.89 and 424.01

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Solution

The fourth proportional to 719.03, 991.89 and 424.01 is: 584.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    719.03 : 991.89 = 424.01 : x
  2. Step 2: Convert to fraction form
    719.03/991.89 = 424.01/x
  3. Step 3: Cross multiply
    719.03x = 991.89 × 424.01
  4. Step 4: Simplify right side
    719.03x = 420,566.32
  5. Step 5: Solve for x
    x = 420,566.32/719.03
  6. Step 6: Final answer
    x = 584.91

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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.