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Finding the Fourth Proportional to 398,660.32, 550,155.52 and 217,370.72

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Solution

The fourth proportional to 398,660.32, 550,155.52 and 217,370.72 is: 299,973.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,660.32 : 550,155.52 = 217,370.72 : x
  2. Step 2: Convert to fraction form
    398,660.32/550,155.52 = 217,370.72/x
  3. Step 3: Cross multiply
    398,660.32x = 550,155.52 × 217,370.72
  4. Step 4: Simplify right side
    398,660.32x = 119,587,701,494.37
  5. Step 5: Solve for x
    x = 119,587,701,494.37/398,660.32
  6. Step 6: Final answer
    x = 299,973.93

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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.