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Finding the Fourth Proportional to 807.35, 1,114.67 and 620.49

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Solution

The fourth proportional to 807.35, 1,114.67 and 620.49 is: 856.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    807.35 : 1,114.67 = 620.49 : x
  2. Step 2: Convert to fraction form
    807.35/1,114.67 = 620.49/x
  3. Step 3: Cross multiply
    807.35x = 1,114.67 × 620.49
  4. Step 4: Simplify right side
    807.35x = 691,636.63
  5. Step 5: Solve for x
    x = 691,636.63/807.35
  6. Step 6: Final answer
    x = 856.68

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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.