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Finding the Fourth Proportional to 808.81, 1,116.13 and 454.72

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Solution

The fourth proportional to 808.81, 1,116.13 and 454.72 is: 627.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    808.81 : 1,116.13 = 454.72 : x
  2. Step 2: Convert to fraction form
    808.81/1,116.13 = 454.72/x
  3. Step 3: Cross multiply
    808.81x = 1,116.13 × 454.72
  4. Step 4: Simplify right side
    808.81x = 507,528.60
  5. Step 5: Solve for x
    x = 507,528.60/808.81
  6. Step 6: Final answer
    x = 627.50

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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.