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Finding the Fourth Proportional to 391,429.44, 540,174.69 and 219,347.79

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Solution

The fourth proportional to 391,429.44, 540,174.69 and 219,347.79 is: 302,701.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,429.44 : 540,174.69 = 219,347.79 : x
  2. Step 2: Convert to fraction form
    391,429.44/540,174.69 = 219,347.79/x
  3. Step 3: Cross multiply
    391,429.44x = 540,174.69 × 219,347.79
  4. Step 4: Simplify right side
    391,429.44x = 118,486,124,465.44
  5. Step 5: Solve for x
    x = 118,486,124,465.44/391,429.44
  6. Step 6: Final answer
    x = 302,701.11

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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.