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Finding the Fourth Proportional to 628,940.60, 867,952.27 and 356,983.05

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Solution

The fourth proportional to 628,940.60, 867,952.27 and 356,983.05 is: 492,644.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,940.60 : 867,952.27 = 356,983.05 : x
  2. Step 2: Convert to fraction form
    628,940.60/867,952.27 = 356,983.05/x
  3. Step 3: Cross multiply
    628,940.60x = 867,952.27 × 356,983.05
  4. Step 4: Simplify right side
    628,940.60x = 309,844,248,599.02
  5. Step 5: Solve for x
    x = 309,844,248,599.02/628,940.60
  6. Step 6: Final answer
    x = 492,644.69

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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.