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Finding the Fourth Proportional to 843.83, 1,164.45 and 470.78

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Solution

The fourth proportional to 843.83, 1,164.45 and 470.78 is: 649.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    843.83 : 1,164.45 = 470.78 : x
  2. Step 2: Convert to fraction form
    843.83/1,164.45 = 470.78/x
  3. Step 3: Cross multiply
    843.83x = 1,164.45 × 470.78
  4. Step 4: Simplify right side
    843.83x = 548,199.77
  5. Step 5: Solve for x
    x = 548,199.77/843.83
  6. Step 6: Final answer
    x = 649.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.