Home / 521,515.39-719,666.35-320,272.51

Finding the Fourth Proportional to 521,515.39, 719,666.35 and 320,272.51

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Solution

The fourth proportional to 521,515.39, 719,666.35 and 320,272.51 is: 441,960.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,515.39 : 719,666.35 = 320,272.51 : x
  2. Step 2: Convert to fraction form
    521,515.39/719,666.35 = 320,272.51/x
  3. Step 3: Cross multiply
    521,515.39x = 719,666.35 × 320,272.51
  4. Step 4: Simplify right side
    521,515.39x = 230,489,348,277.04
  5. Step 5: Solve for x
    x = 230,489,348,277.04/521,515.39
  6. Step 6: Final answer
    x = 441,960.78

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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.