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Finding the Fourth Proportional to 902.80, 1,245.60 and 570.94

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Solution

The fourth proportional to 902.80, 1,245.60 and 570.94 is: 787.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    902.80 : 1,245.60 = 570.94 : x
  2. Step 2: Convert to fraction form
    902.80/1,245.60 = 570.94/x
  3. Step 3: Cross multiply
    902.80x = 1,245.60 × 570.94
  4. Step 4: Simplify right side
    902.80x = 711,162.86
  5. Step 5: Solve for x
    x = 711,162.86/902.80
  6. Step 6: Final answer
    x = 787.73

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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.