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Finding the Fourth Proportional to 877.37, 1,315.43 and 414.89

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Solution

The fourth proportional to 877.37, 1,315.43 and 414.89 is: 622.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    877.37 : 1,315.43 = 414.89 : x
  2. Step 2: Convert to fraction form
    877.37/1,315.43 = 414.89/x
  3. Step 3: Cross multiply
    877.37x = 1,315.43 × 414.89
  4. Step 4: Simplify right side
    877.37x = 545,756.59
  5. Step 5: Solve for x
    x = 545,756.59/877.37
  6. Step 6: Final answer
    x = 622.04

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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.