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Finding the Fourth Proportional to 391,499.68, 540,307.47 and 219,446.87

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Solution

The fourth proportional to 391,499.68, 540,307.47 and 219,446.87 is: 302,857.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,499.68 : 540,307.47 = 219,446.87 : x
  2. Step 2: Convert to fraction form
    391,499.68/540,307.47 = 219,446.87/x
  3. Step 3: Cross multiply
    391,499.68x = 540,307.47 × 219,446.87
  4. Step 4: Simplify right side
    391,499.68x = 118,568,780,427.58
  5. Step 5: Solve for x
    x = 118,568,780,427.58/391,499.68
  6. Step 6: Final answer
    x = 302,857.93

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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.