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Finding the Fourth Proportional to 808.90, 1,116.33 and 454.83

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Solution

The fourth proportional to 808.90, 1,116.33 and 454.83 is: 627.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    808.90 : 1,116.33 = 454.83 : x
  2. Step 2: Convert to fraction form
    808.90/1,116.33 = 454.83/x
  3. Step 3: Cross multiply
    808.90x = 1,116.33 × 454.83
  4. Step 4: Simplify right side
    808.90x = 507,740.37
  5. Step 5: Solve for x
    x = 507,740.37/808.90
  6. Step 6: Final answer
    x = 627.69

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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.