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Finding the Fourth Proportional to 835.46, 1,248.56 and 787.45

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Solution

The fourth proportional to 835.46, 1,248.56 and 787.45 is: 1,176.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    835.46 : 1,248.56 = 787.45 : x
  2. Step 2: Convert to fraction form
    835.46/1,248.56 = 787.45/x
  3. Step 3: Cross multiply
    835.46x = 1,248.56 × 787.45
  4. Step 4: Simplify right side
    835.46x = 983,168.39
  5. Step 5: Solve for x
    x = 983,168.39/835.46
  6. Step 6: Final answer
    x = 1,176.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.