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Finding the Fourth Proportional to 719.88, 1,078.70 and 334.68

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Solution

The fourth proportional to 719.88, 1,078.70 and 334.68 is: 501.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    719.88 : 1,078.70 = 334.68 : x
  2. Step 2: Convert to fraction form
    719.88/1,078.70 = 334.68/x
  3. Step 3: Cross multiply
    719.88x = 1,078.70 × 334.68
  4. Step 4: Simplify right side
    719.88x = 361,019.32
  5. Step 5: Solve for x
    x = 361,019.32/719.88
  6. Step 6: Final answer
    x = 501.50

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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.