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Finding the Fourth Proportional to 518,964.50, 716,171.09 and 280,500.50

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Solution

The fourth proportional to 518,964.50, 716,171.09 and 280,500.50 is: 387,090.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,964.50 : 716,171.09 = 280,500.50 : x
  2. Step 2: Convert to fraction form
    518,964.50/716,171.09 = 280,500.50/x
  3. Step 3: Cross multiply
    518,964.50x = 716,171.09 × 280,500.50
  4. Step 4: Simplify right side
    518,964.50x = 200,886,348,830.55
  5. Step 5: Solve for x
    x = 200,886,348,830.55/518,964.50
  6. Step 6: Final answer
    x = 387,090.73

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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.