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Finding the Fourth Proportional to 718.94, 992.18 and 424.26

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Solution

The fourth proportional to 718.94, 992.18 and 424.26 is: 585.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    718.94 : 992.18 = 424.26 : x
  2. Step 2: Convert to fraction form
    718.94/992.18 = 424.26/x
  3. Step 3: Cross multiply
    718.94x = 992.18 × 424.26
  4. Step 4: Simplify right side
    718.94x = 420,943.35
  5. Step 5: Solve for x
    x = 420,943.35/718.94
  6. Step 6: Final answer
    x = 585.50

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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.