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Finding the Fourth Proportional to 780.36, 1,170.90 and 468.36

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Solution

The fourth proportional to 780.36, 1,170.90 and 468.36 is: 702.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    780.36 : 1,170.90 = 468.36 : x
  2. Step 2: Convert to fraction form
    780.36/1,170.90 = 468.36/x
  3. Step 3: Cross multiply
    780.36x = 1,170.90 × 468.36
  4. Step 4: Simplify right side
    780.36x = 548,402.72
  5. Step 5: Solve for x
    x = 548,402.72/780.36
  6. Step 6: Final answer
    x = 702.76

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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.