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Finding the Fourth Proportional to 286,498.73, 431,412.77 and 212,145.59

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Solution

The fourth proportional to 286,498.73, 431,412.77 and 212,145.59 is: 319,451.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,498.73 : 431,412.77 = 212,145.59 : x
  2. Step 2: Convert to fraction form
    286,498.73/431,412.77 = 212,145.59/x
  3. Step 3: Cross multiply
    286,498.73x = 431,412.77 × 212,145.59
  4. Step 4: Simplify right side
    286,498.73x = 91,522,313,407.39
  5. Step 5: Solve for x
    x = 91,522,313,407.39/286,498.73
  6. Step 6: Final answer
    x = 319,451.03

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.