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Finding the Fourth Proportional to 667,041.55, 920,516.20 and 361,117.81

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Solution

The fourth proportional to 667,041.55, 920,516.20 and 361,117.81 is: 498,341.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,041.55 : 920,516.20 = 361,117.81 : x
  2. Step 2: Convert to fraction form
    667,041.55/920,516.20 = 361,117.81/x
  3. Step 3: Cross multiply
    667,041.55x = 920,516.20 × 361,117.81
  4. Step 4: Simplify right side
    667,041.55x = 332,414,794,461.37
  5. Step 5: Solve for x
    x = 332,414,794,461.37/667,041.55
  6. Step 6: Final answer
    x = 498,341.96

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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.