Home / 398,107.20-549,379.71-216,822.31

Finding the Fourth Proportional to 398,107.20, 549,379.71 and 216,822.31

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Solution

The fourth proportional to 398,107.20, 549,379.71 and 216,822.31 is: 299,210.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,107.20 : 549,379.71 = 216,822.31 : x
  2. Step 2: Convert to fraction form
    398,107.20/549,379.71 = 216,822.31/x
  3. Step 3: Cross multiply
    398,107.20x = 549,379.71 × 216,822.31
  4. Step 4: Simplify right side
    398,107.20x = 119,117,777,789.33
  5. Step 5: Solve for x
    x = 119,117,777,789.33/398,107.20
  6. Step 6: Final answer
    x = 299,210.31

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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.