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Finding the Fourth Proportional to 426,900.60, 639,573.30 and 347,585.40

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Solution

The fourth proportional to 426,900.60, 639,573.30 and 347,585.40 is: 520,744.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,900.60 : 639,573.30 = 347,585.40 : x
  2. Step 2: Convert to fraction form
    426,900.60/639,573.30 = 347,585.40/x
  3. Step 3: Cross multiply
    426,900.60x = 639,573.30 × 347,585.40
  4. Step 4: Simplify right side
    426,900.60x = 222,306,341,309.82
  5. Step 5: Solve for x
    x = 222,306,341,309.82/426,900.60
  6. Step 6: Final answer
    x = 520,744.97

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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.