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Finding the Fourth Proportional to 391,113.08, 539,736.27 and 212,265.08

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Solution

The fourth proportional to 391,113.08, 539,736.27 and 212,265.08 is: 292,925.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,113.08 : 539,736.27 = 212,265.08 : x
  2. Step 2: Convert to fraction form
    391,113.08/539,736.27 = 212,265.08/x
  3. Step 3: Cross multiply
    391,113.08x = 539,736.27 × 212,265.08
  4. Step 4: Simplify right side
    391,113.08x = 114,567,162,530.45
  5. Step 5: Solve for x
    x = 114,567,162,530.45/391,113.08
  6. Step 6: Final answer
    x = 292,925.93

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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.