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Finding the Fourth Proportional to 902.61, 1,245.15 and 570.92

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Solution

The fourth proportional to 902.61, 1,245.15 and 570.92 is: 787.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    902.61 : 1,245.15 = 570.92 : x
  2. Step 2: Convert to fraction form
    902.61/1,245.15 = 570.92/x
  3. Step 3: Cross multiply
    902.61x = 1,245.15 × 570.92
  4. Step 4: Simplify right side
    902.61x = 710,874.81
  5. Step 5: Solve for x
    x = 710,874.81/902.61
  6. Step 6: Final answer
    x = 787.58

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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.