Home / 478,743.09-718,278.68-163,421.43

Finding the Fourth Proportional to 478,743.09, 718,278.68 and 163,421.43

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Solution

The fourth proportional to 478,743.09, 718,278.68 and 163,421.43 is: 245,188.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,743.09 : 718,278.68 = 163,421.43 : x
  2. Step 2: Convert to fraction form
    478,743.09/718,278.68 = 163,421.43/x
  3. Step 3: Cross multiply
    478,743.09x = 718,278.68 × 163,421.43
  4. Step 4: Simplify right side
    478,743.09x = 117,382,128,207.01
  5. Step 5: Solve for x
    x = 117,382,128,207.01/478,743.09
  6. Step 6: Final answer
    x = 245,188.14

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.