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Finding the Fourth Proportional to 399,055.32, 550,699.56 and 217,768.68

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Solution

The fourth proportional to 399,055.32, 550,699.56 and 217,768.68 is: 300,522.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,055.32 : 550,699.56 = 217,768.68 : x
  2. Step 2: Convert to fraction form
    399,055.32/550,699.56 = 217,768.68/x
  3. Step 3: Cross multiply
    399,055.32x = 550,699.56 × 217,768.68
  4. Step 4: Simplify right side
    399,055.32x = 119,925,116,257.78
  5. Step 5: Solve for x
    x = 119,925,116,257.78/399,055.32
  6. Step 6: Final answer
    x = 300,522.53

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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.