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Finding the Fourth Proportional to 398,719.01, 550,245.51 and 217,440.83

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Solution

The fourth proportional to 398,719.01, 550,245.51 and 217,440.83 is: 300,075.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,719.01 : 550,245.51 = 217,440.83 : x
  2. Step 2: Convert to fraction form
    398,719.01/550,245.51 = 217,440.83/x
  3. Step 3: Cross multiply
    398,719.01x = 550,245.51 × 217,440.83
  4. Step 4: Simplify right side
    398,719.01x = 119,645,837,646.95
  5. Step 5: Solve for x
    x = 119,645,837,646.95/398,719.01
  6. Step 6: Final answer
    x = 300,075.58

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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.