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Finding the Fourth Proportional to 398,980.80, 550,594.08 and 217,693.56

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Solution

The fourth proportional to 398,980.80, 550,594.08 and 217,693.56 is: 300,417.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,980.80 : 550,594.08 = 217,693.56 : x
  2. Step 2: Convert to fraction form
    398,980.80/550,594.08 = 217,693.56/x
  3. Step 3: Cross multiply
    398,980.80x = 550,594.08 × 217,693.56
  4. Step 4: Simplify right side
    398,980.80x = 119,860,785,390.13
  5. Step 5: Solve for x
    x = 119,860,785,390.13/398,980.80
  6. Step 6: Final answer
    x = 300,417.43

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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.