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Finding the Fourth Proportional to 992.79, 1,489.41 and 334.89

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Solution

The fourth proportional to 992.79, 1,489.41 and 334.89 is: 502.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    992.79 : 1,489.41 = 334.89 : x
  2. Step 2: Convert to fraction form
    992.79/1,489.41 = 334.89/x
  3. Step 3: Cross multiply
    992.79x = 1,489.41 × 334.89
  4. Step 4: Simplify right side
    992.79x = 498,788.51
  5. Step 5: Solve for x
    x = 498,788.51/992.79
  6. Step 6: Final answer
    x = 502.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.