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Finding the Fourth Proportional to 403,900.60, 605,850.90 and 137,637.40

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Solution

The fourth proportional to 403,900.60, 605,850.90 and 137,637.40 is: 206,456.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,900.60 : 605,850.90 = 137,637.40 : x
  2. Step 2: Convert to fraction form
    403,900.60/605,850.90 = 137,637.40/x
  3. Step 3: Cross multiply
    403,900.60x = 605,850.90 × 137,637.40
  4. Step 4: Simplify right side
    403,900.60x = 83,387,742,663.66
  5. Step 5: Solve for x
    x = 83,387,742,663.66/403,900.60
  6. Step 6: Final answer
    x = 206,456.10

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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.