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Finding the Fourth Proportional to 787.36, 1,181.76 and 499.36

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Solution

The fourth proportional to 787.36, 1,181.76 and 499.36 is: 749.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    787.36 : 1,181.76 = 499.36 : x
  2. Step 2: Convert to fraction form
    787.36/1,181.76 = 499.36/x
  3. Step 3: Cross multiply
    787.36x = 1,181.76 × 499.36
  4. Step 4: Simplify right side
    787.36x = 590,123.67
  5. Step 5: Solve for x
    x = 590,123.67/787.36
  6. Step 6: Final answer
    x = 749.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.