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Finding the Fourth Proportional to 426,375.60, 638,785.80 and 347,060.40

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Solution

The fourth proportional to 426,375.60, 638,785.80 and 347,060.40 is: 519,957.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,375.60 : 638,785.80 = 347,060.40 : x
  2. Step 2: Convert to fraction form
    426,375.60/638,785.80 = 347,060.40/x
  3. Step 3: Cross multiply
    426,375.60x = 638,785.80 × 347,060.40
  4. Step 4: Simplify right side
    426,375.60x = 221,697,255,262.32
  5. Step 5: Solve for x
    x = 221,697,255,262.32/426,375.60
  6. Step 6: Final answer
    x = 519,957.65

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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.