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Finding the Fourth Proportional to 806.16, 1,112.70 and 457.05

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Solution

The fourth proportional to 806.16, 1,112.70 and 457.05 is: 630.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    806.16 : 1,112.70 = 457.05 : x
  2. Step 2: Convert to fraction form
    806.16/1,112.70 = 457.05/x
  3. Step 3: Cross multiply
    806.16x = 1,112.70 × 457.05
  4. Step 4: Simplify right side
    806.16x = 508,557.08
  5. Step 5: Solve for x
    x = 508,557.08/806.16
  6. Step 6: Final answer
    x = 630.84

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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.