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Finding the Fourth Proportional to 390,251.12, 538,544.76 and 211,403.12

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Solution

The fourth proportional to 390,251.12, 538,544.76 and 211,403.12 is: 291,735.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,251.12 : 538,544.76 = 211,403.12 : x
  2. Step 2: Convert to fraction form
    390,251.12/538,544.76 = 211,403.12/x
  3. Step 3: Cross multiply
    390,251.12x = 538,544.76 × 211,403.12
  4. Step 4: Simplify right side
    390,251.12x = 113,850,042,523.65
  5. Step 5: Solve for x
    x = 113,850,042,523.65/390,251.12
  6. Step 6: Final answer
    x = 291,735.34

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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.