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Finding the Fourth Proportional to 719.35, 1,078.35 and 458.62

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Solution

The fourth proportional to 719.35, 1,078.35 and 458.62 is: 687.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    719.35 : 1,078.35 = 458.62 : x
  2. Step 2: Convert to fraction form
    719.35/1,078.35 = 458.62/x
  3. Step 3: Cross multiply
    719.35x = 1,078.35 × 458.62
  4. Step 4: Simplify right side
    719.35x = 494,552.51
  5. Step 5: Solve for x
    x = 494,552.51/719.35
  6. Step 6: Final answer
    x = 687.50

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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.