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Finding the Fourth Proportional to 479.95, 719.95 and 155.34

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Solution

The fourth proportional to 479.95, 719.95 and 155.34 is: 233.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.95 : 719.95 = 155.34 : x
  2. Step 2: Convert to fraction form
    479.95/719.95 = 155.34/x
  3. Step 3: Cross multiply
    479.95x = 719.95 × 155.34
  4. Step 4: Simplify right side
    479.95x = 111,836.26
  5. Step 5: Solve for x
    x = 111,836.26/479.95
  6. Step 6: Final answer
    x = 233.02

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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.