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Finding the Fourth Proportional to 403,765.60, 605,648.40 and 137,437.60

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Solution

The fourth proportional to 403,765.60, 605,648.40 and 137,437.60 is: 206,156.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,765.60 : 605,648.40 = 137,437.60 : x
  2. Step 2: Convert to fraction form
    403,765.60/605,648.40 = 137,437.60/x
  3. Step 3: Cross multiply
    403,765.60x = 605,648.40 × 137,437.60
  4. Step 4: Simplify right side
    403,765.60x = 83,238,862,539.84
  5. Step 5: Solve for x
    x = 83,238,862,539.84/403,765.60
  6. Step 6: Final answer
    x = 206,156.40

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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.