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Finding the Fourth Proportional to 738.46, 1,107.78 and 507.88

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Solution

The fourth proportional to 738.46, 1,107.78 and 507.88 is: 761.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    738.46 : 1,107.78 = 507.88 : x
  2. Step 2: Convert to fraction form
    738.46/1,107.78 = 507.88/x
  3. Step 3: Cross multiply
    738.46x = 1,107.78 × 507.88
  4. Step 4: Simplify right side
    738.46x = 562,619.31
  5. Step 5: Solve for x
    x = 562,619.31/738.46
  6. Step 6: Final answer
    x = 761.88

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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.