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Finding the Fourth Proportional to 313,365.38, 432,800.28 and 211,214.79

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Solution

The fourth proportional to 313,365.38, 432,800.28 and 211,214.79 is: 291,716.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    313,365.38 : 432,800.28 = 211,214.79 : x
  2. Step 2: Convert to fraction form
    313,365.38/432,800.28 = 211,214.79/x
  3. Step 3: Cross multiply
    313,365.38x = 432,800.28 × 211,214.79
  4. Step 4: Simplify right side
    313,365.38x = 91,413,820,252.14
  5. Step 5: Solve for x
    x = 91,413,820,252.14/313,365.38
  6. Step 6: Final answer
    x = 291,716.40

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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.