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Finding the Fourth Proportional to 426,366.60, 638,772.30 and 347,051.40

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Solution

The fourth proportional to 426,366.60, 638,772.30 and 347,051.40 is: 519,944.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,366.60 : 638,772.30 = 347,051.40 : x
  2. Step 2: Convert to fraction form
    426,366.60/638,772.30 = 347,051.40/x
  3. Step 3: Cross multiply
    426,366.60x = 638,772.30 × 347,051.40
  4. Step 4: Simplify right side
    426,366.60x = 221,686,820,996.22
  5. Step 5: Solve for x
    x = 221,686,820,996.22/426,366.60
  6. Step 6: Final answer
    x = 519,944.15

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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.