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Finding the Fourth Proportional to 403,898.60, 605,847.90 and 137,635.40

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Solution

The fourth proportional to 403,898.60, 605,847.90 and 137,635.40 is: 206,453.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,898.60 : 605,847.90 = 137,635.40 : x
  2. Step 2: Convert to fraction form
    403,898.60/605,847.90 = 137,635.40/x
  3. Step 3: Cross multiply
    403,898.60x = 605,847.90 × 137,635.40
  4. Step 4: Simplify right side
    403,898.60x = 83,386,118,055.66
  5. Step 5: Solve for x
    x = 83,386,118,055.66/403,898.60
  6. Step 6: Final answer
    x = 206,453.10

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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.