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Finding the Fourth Proportional to 674,392.50, 930,688.38 and 387,912.24

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Solution

The fourth proportional to 674,392.50, 930,688.38 and 387,912.24 is: 535,334.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    674,392.50 : 930,688.38 = 387,912.24 : x
  2. Step 2: Convert to fraction form
    674,392.50/930,688.38 = 387,912.24/x
  3. Step 3: Cross multiply
    674,392.50x = 930,688.38 × 387,912.24
  4. Step 4: Simplify right side
    674,392.50x = 361,025,414,227.77
  5. Step 5: Solve for x
    x = 361,025,414,227.77/674,392.50
  6. Step 6: Final answer
    x = 535,334.27

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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.