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Finding the Fourth Proportional to 393,911.70, 590,867.55 and 387,350.70

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Solution

The fourth proportional to 393,911.70, 590,867.55 and 387,350.70 is: 581,026.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,911.70 : 590,867.55 = 387,350.70 : x
  2. Step 2: Convert to fraction form
    393,911.70/590,867.55 = 387,350.70/x
  3. Step 3: Cross multiply
    393,911.70x = 590,867.55 × 387,350.70
  4. Step 4: Simplify right side
    393,911.70x = 228,872,959,099.79
  5. Step 5: Solve for x
    x = 228,872,959,099.79/393,911.70
  6. Step 6: Final answer
    x = 581,026.05

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.