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Finding the Fourth Proportional to 391,502.86, 540,534.23 and 300,696.49

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Solution

The fourth proportional to 391,502.86, 540,534.23 and 300,696.49 is: 415,161.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,502.86 : 540,534.23 = 300,696.49 : x
  2. Step 2: Convert to fraction form
    391,502.86/540,534.23 = 300,696.49/x
  3. Step 3: Cross multiply
    391,502.86x = 540,534.23 × 300,696.49
  4. Step 4: Simplify right side
    391,502.86x = 162,536,745,685.85
  5. Step 5: Solve for x
    x = 162,536,745,685.85/391,502.86
  6. Step 6: Final answer
    x = 415,161.07

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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.