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Finding the Fourth Proportional to 340.86, 469.70 and 289.02

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Solution

The fourth proportional to 340.86, 469.70 and 289.02 is: 398.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    340.86 : 469.70 = 289.02 : x
  2. Step 2: Convert to fraction form
    340.86/469.70 = 289.02/x
  3. Step 3: Cross multiply
    340.86x = 469.70 × 289.02
  4. Step 4: Simplify right side
    340.86x = 135,752.69
  5. Step 5: Solve for x
    x = 135,752.69/340.86
  6. Step 6: Final answer
    x = 398.27

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.