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Finding the Fourth Proportional to 346,757.54, 478,390.23 and 217,620.66

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Solution

The fourth proportional to 346,757.54, 478,390.23 and 217,620.66 is: 300,231.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    346,757.54 : 478,390.23 = 217,620.66 : x
  2. Step 2: Convert to fraction form
    346,757.54/478,390.23 = 217,620.66/x
  3. Step 3: Cross multiply
    346,757.54x = 478,390.23 × 217,620.66
  4. Step 4: Simplify right side
    346,757.54x = 104,107,597,590.15
  5. Step 5: Solve for x
    x = 104,107,597,590.15/346,757.54
  6. Step 6: Final answer
    x = 300,231.68

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1.5x scale

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.