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Finding the Fourth Proportional to 780.06, 1,169.46 and 535.86

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Solution

The fourth proportional to 780.06, 1,169.46 and 535.86 is: 803.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    780.06 : 1,169.46 = 535.86 : x
  2. Step 2: Convert to fraction form
    780.06/1,169.46 = 535.86/x
  3. Step 3: Cross multiply
    780.06x = 1,169.46 × 535.86
  4. Step 4: Simplify right side
    780.06x = 626,666.84
  5. Step 5: Solve for x
    x = 626,666.84/780.06
  6. Step 6: Final answer
    x = 803.36

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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.