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Finding the Fourth Proportional to 808.77, 1,115.99 and 454.69

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Solution

The fourth proportional to 808.77, 1,115.99 and 454.69 is: 627.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    808.77 : 1,115.99 = 454.69 : x
  2. Step 2: Convert to fraction form
    808.77/1,115.99 = 454.69/x
  3. Step 3: Cross multiply
    808.77x = 1,115.99 × 454.69
  4. Step 4: Simplify right side
    808.77x = 507,429.49
  5. Step 5: Solve for x
    x = 507,429.49/808.77
  6. Step 6: Final answer
    x = 627.41

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Double scale
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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.