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Finding the Fourth Proportional to 472.95, 708.65 and 289.96

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Solution

The fourth proportional to 472.95, 708.65 and 289.96 is: 434.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    472.95 : 708.65 = 289.96 : x
  2. Step 2: Convert to fraction form
    472.95/708.65 = 289.96/x
  3. Step 3: Cross multiply
    472.95x = 708.65 × 289.96
  4. Step 4: Simplify right side
    472.95x = 205,480.15
  5. Step 5: Solve for x
    x = 205,480.15/472.95
  6. Step 6: Final answer
    x = 434.46

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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.