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Finding the Fourth Proportional to 391,468.83, 540,265.05 and 219,416.10

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Solution

The fourth proportional to 391,468.83, 540,265.05 and 219,416.10 is: 302,815.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,468.83 : 540,265.05 = 219,416.10 : x
  2. Step 2: Convert to fraction form
    391,468.83/540,265.05 = 219,416.10/x
  3. Step 3: Cross multiply
    391,468.83x = 540,265.05 × 219,416.10
  4. Step 4: Simplify right side
    391,468.83x = 118,542,850,237.31
  5. Step 5: Solve for x
    x = 118,542,850,237.31/391,468.83
  6. Step 6: Final answer
    x = 302,815.55

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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.