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Finding the Fourth Proportional to 391,416.35, 540,126.18 and 219,310.02

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Solution

The fourth proportional to 391,416.35, 540,126.18 and 219,310.02 is: 302,631.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,416.35 : 540,126.18 = 219,310.02 : x
  2. Step 2: Convert to fraction form
    391,416.35/540,126.18 = 219,310.02/x
  3. Step 3: Cross multiply
    391,416.35x = 540,126.18 × 219,310.02
  4. Step 4: Simplify right side
    391,416.35x = 118,455,083,338.32
  5. Step 5: Solve for x
    x = 118,455,083,338.32/391,416.35
  6. Step 6: Final answer
    x = 302,631.93

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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.