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Finding the Fourth Proportional to 877.83, 1,316.94 and 330

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Solution

The fourth proportional to 877.83, 1,316.94 and 330 is: 495.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    877.83 : 1,316.94 = 330 : x
  2. Step 2: Convert to fraction form
    877.83/1,316.94 = 330/x
  3. Step 3: Cross multiply
    877.83x = 1,316.94 × 330
  4. Step 4: Simplify right side
    877.83x = 434,590.20
  5. Step 5: Solve for x
    x = 434,590.20/877.83
  6. Step 6: Final answer
    x = 495.07

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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.