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Finding the Fourth Proportional to 438,665.20, 657,997.80 and 367,806.40

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Solution

The fourth proportional to 438,665.20, 657,997.80 and 367,806.40 is: 551,709.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,665.20 : 657,997.80 = 367,806.40 : x
  2. Step 2: Convert to fraction form
    438,665.20/657,997.80 = 367,806.40/x
  3. Step 3: Cross multiply
    438,665.20x = 657,997.80 × 367,806.40
  4. Step 4: Simplify right side
    438,665.20x = 242,015,802,025.92
  5. Step 5: Solve for x
    x = 242,015,802,025.92/438,665.20
  6. Step 6: Final answer
    x = 551,709.60

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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.