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Finding the Fourth Proportional to 700,276.50, 966,424.77 and 398,469.78

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Solution

The fourth proportional to 700,276.50, 966,424.77 and 398,469.78 is: 549,912.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    700,276.50 : 966,424.77 = 398,469.78 : x
  2. Step 2: Convert to fraction form
    700,276.50/966,424.77 = 398,469.78/x
  3. Step 3: Cross multiply
    700,276.50x = 966,424.77 × 398,469.78
  4. Step 4: Simplify right side
    700,276.50x = 385,091,065,488.45
  5. Step 5: Solve for x
    x = 385,091,065,488.45/700,276.50
  6. Step 6: Final answer
    x = 549,912.88

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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.