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Finding the Fourth Proportional to 522,052.80, 781,912.80 and 428,740.80

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Solution

The fourth proportional to 522,052.80, 781,912.80 and 428,740.80 is: 642,153.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    522,052.80 : 781,912.80 = 428,740.80 : x
  2. Step 2: Convert to fraction form
    522,052.80/781,912.80 = 428,740.80/x
  3. Step 3: Cross multiply
    522,052.80x = 781,912.80 × 428,740.80
  4. Step 4: Simplify right side
    522,052.80x = 335,237,919,402.24
  5. Step 5: Solve for x
    x = 335,237,919,402.24/522,052.80
  6. Step 6: Final answer
    x = 642,153.28

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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.