Home / 390,321.12-538,643.04-211,473.12

Finding the Fourth Proportional to 390,321.12, 538,643.04 and 211,473.12

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Solution

The fourth proportional to 390,321.12, 538,643.04 and 211,473.12 is: 291,832.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,321.12 : 538,643.04 = 211,473.12 : x
  2. Step 2: Convert to fraction form
    390,321.12/538,643.04 = 211,473.12/x
  3. Step 3: Cross multiply
    390,321.12x = 538,643.04 × 211,473.12
  4. Step 4: Simplify right side
    390,321.12x = 113,908,524,235.09
  5. Step 5: Solve for x
    x = 113,908,524,235.09/390,321.12
  6. Step 6: Final answer
    x = 291,832.85

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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.