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Finding the Fourth Proportional to 806.19, 1,112.40 and 456.81

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Solution

The fourth proportional to 806.19, 1,112.40 and 456.81 is: 630.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    806.19 : 1,112.40 = 456.81 : x
  2. Step 2: Convert to fraction form
    806.19/1,112.40 = 456.81/x
  3. Step 3: Cross multiply
    806.19x = 1,112.40 × 456.81
  4. Step 4: Simplify right side
    806.19x = 508,155.44
  5. Step 5: Solve for x
    x = 508,155.44/806.19
  6. Step 6: Final answer
    x = 630.32

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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.