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Finding the Fourth Proportional to 391,516.68, 540,330.90 and 219,463.86

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Solution

The fourth proportional to 391,516.68, 540,330.90 and 219,463.86 is: 302,881.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,516.68 : 540,330.90 = 219,463.86 : x
  2. Step 2: Convert to fraction form
    391,516.68/540,330.90 = 219,463.86/x
  3. Step 3: Cross multiply
    391,516.68x = 540,330.90 × 219,463.86
  4. Step 4: Simplify right side
    391,516.68x = 118,583,104,991.27
  5. Step 5: Solve for x
    x = 118,583,104,991.27/391,516.68
  6. Step 6: Final answer
    x = 302,881.36

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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.