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Finding the Fourth Proportional to 780.19, 1,170.29 and 224.91

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Solution

The fourth proportional to 780.19, 1,170.29 and 224.91 is: 337.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    780.19 : 1,170.29 = 224.91 : x
  2. Step 2: Convert to fraction form
    780.19/1,170.29 = 224.91/x
  3. Step 3: Cross multiply
    780.19x = 1,170.29 × 224.91
  4. Step 4: Simplify right side
    780.19x = 263,210.49
  5. Step 5: Solve for x
    x = 263,210.49/780.19
  6. Step 6: Final answer
    x = 337.37

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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.