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Finding the Fourth Proportional to 477.70, 719.58 and 434.65

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Solution

The fourth proportional to 477.70, 719.58 and 434.65 is: 654.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    477.70 : 719.58 = 434.65 : x
  2. Step 2: Convert to fraction form
    477.70/719.58 = 434.65/x
  3. Step 3: Cross multiply
    477.70x = 719.58 × 434.65
  4. Step 4: Simplify right side
    477.70x = 312,765.45
  5. Step 5: Solve for x
    x = 312,765.45/477.70
  6. Step 6: Final answer
    x = 654.73

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.