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Finding the Fourth Proportional to 472.32, 707.36 and 289.89

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Solution

The fourth proportional to 472.32, 707.36 and 289.89 is: 434.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    472.32 : 707.36 = 289.89 : x
  2. Step 2: Convert to fraction form
    472.32/707.36 = 289.89/x
  3. Step 3: Cross multiply
    472.32x = 707.36 × 289.89
  4. Step 4: Simplify right side
    472.32x = 205,055.14
  5. Step 5: Solve for x
    x = 205,055.14/472.32
  6. Step 6: Final answer
    x = 434.14

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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.