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Finding the Fourth Proportional to 518,711.74, 716,000.79 and 303,921.34

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Solution

The fourth proportional to 518,711.74, 716,000.79 and 303,921.34 is: 419,516.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,711.74 : 716,000.79 = 303,921.34 : x
  2. Step 2: Convert to fraction form
    518,711.74/716,000.79 = 303,921.34/x
  3. Step 3: Cross multiply
    518,711.74x = 716,000.79 × 303,921.34
  4. Step 4: Simplify right side
    518,711.74x = 217,607,919,537.86
  5. Step 5: Solve for x
    x = 217,607,919,537.86/518,711.74
  6. Step 6: Final answer
    x = 419,516.09

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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.