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Finding the Fourth Proportional to 806.24, 1,112.63 and 570.61

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Solution

The fourth proportional to 806.24, 1,112.63 and 570.61 is: 787.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    806.24 : 1,112.63 = 570.61 : x
  2. Step 2: Convert to fraction form
    806.24/1,112.63 = 570.61/x
  3. Step 3: Cross multiply
    806.24x = 1,112.63 × 570.61
  4. Step 4: Simplify right side
    806.24x = 634,877.80
  5. Step 5: Solve for x
    x = 634,877.80/806.24
  6. Step 6: Final answer
    x = 787.46

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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.