Home / 398,436.72-549,826.62-217,144.80

Finding the Fourth Proportional to 398,436.72, 549,826.62 and 217,144.80

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Solution

The fourth proportional to 398,436.72, 549,826.62 and 217,144.80 is: 299,651.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,436.72 : 549,826.62 = 217,144.80 : x
  2. Step 2: Convert to fraction form
    398,436.72/549,826.62 = 217,144.80/x
  3. Step 3: Cross multiply
    398,436.72x = 549,826.62 × 217,144.80
  4. Step 4: Simplify right side
    398,436.72x = 119,391,991,434.58
  5. Step 5: Solve for x
    x = 119,391,991,434.58/398,436.72
  6. Step 6: Final answer
    x = 299,651.07

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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.