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Finding the Fourth Proportional to 522,939.40, 784,305.78 and 143,762.28

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Solution

The fourth proportional to 522,939.40, 784,305.78 and 143,762.28 is: 215,615.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    522,939.40 : 784,305.78 = 143,762.28 : x
  2. Step 2: Convert to fraction form
    522,939.40/784,305.78 = 143,762.28/x
  3. Step 3: Cross multiply
    522,939.40x = 784,305.78 × 143,762.28
  4. Step 4: Simplify right side
    522,939.40x = 112,753,587,149.98
  5. Step 5: Solve for x
    x = 112,753,587,149.98/522,939.40
  6. Step 6: Final answer
    x = 215,615.02

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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.