Home / 398,431.23-549,819.03-217,139.25

Finding the Fourth Proportional to 398,431.23, 549,819.03 and 217,139.25

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Solution

The fourth proportional to 398,431.23, 549,819.03 and 217,139.25 is: 299,643.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,431.23 : 549,819.03 = 217,139.25 : x
  2. Step 2: Convert to fraction form
    398,431.23/549,819.03 = 217,139.25/x
  3. Step 3: Cross multiply
    398,431.23x = 549,819.03 × 217,139.25
  4. Step 4: Simplify right side
    398,431.23x = 119,387,291,809.93
  5. Step 5: Solve for x
    x = 119,387,291,809.93/398,431.23
  6. Step 6: Final answer
    x = 299,643.41

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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.