Home / 398,109.20-549,382.47-216,824.31

Finding the Fourth Proportional to 398,109.20, 549,382.47 and 216,824.31

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Solution

The fourth proportional to 398,109.20, 549,382.47 and 216,824.31 is: 299,213.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,109.20 : 549,382.47 = 216,824.31 : x
  2. Step 2: Convert to fraction form
    398,109.20/549,382.47 = 216,824.31/x
  3. Step 3: Cross multiply
    398,109.20x = 549,382.47 × 216,824.31
  4. Step 4: Simplify right side
    398,109.20x = 119,119,474,983.85
  5. Step 5: Solve for x
    x = 119,119,474,983.85/398,109.20
  6. Step 6: Final answer
    x = 299,213.07

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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.