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Finding the Fourth Proportional to 806.70, 1,113.46 and 526.80

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Solution

The fourth proportional to 806.70, 1,113.46 and 526.80 is: 727.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    806.70 : 1,113.46 = 526.80 : x
  2. Step 2: Convert to fraction form
    806.70/1,113.46 = 526.80/x
  3. Step 3: Cross multiply
    806.70x = 1,113.46 × 526.80
  4. Step 4: Simplify right side
    806.70x = 586,570.73
  5. Step 5: Solve for x
    x = 586,570.73/806.70
  6. Step 6: Final answer
    x = 727.12

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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.