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Finding the Fourth Proportional to 391,585.74, 540,421.37 and 219,500.96

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Solution

The fourth proportional to 391,585.74, 540,421.37 and 219,500.96 is: 302,929.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,585.74 : 540,421.37 = 219,500.96 : x
  2. Step 2: Convert to fraction form
    391,585.74/540,421.37 = 219,500.96/x
  3. Step 3: Cross multiply
    391,585.74x = 540,421.37 × 219,500.96
  4. Step 4: Simplify right side
    391,585.74x = 118,623,006,543.03
  5. Step 5: Solve for x
    x = 118,623,006,543.03/391,585.74
  6. Step 6: Final answer
    x = 302,929.84

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.