Home / 403,623.60-605,435.40-261,697.20

Finding the Fourth Proportional to 403,623.60, 605,435.40 and 261,697.20

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Solution

The fourth proportional to 403,623.60, 605,435.40 and 261,697.20 is: 392,545.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,623.60 : 605,435.40 = 261,697.20 : x
  2. Step 2: Convert to fraction form
    403,623.60/605,435.40 = 261,697.20/x
  3. Step 3: Cross multiply
    403,623.60x = 605,435.40 × 261,697.20
  4. Step 4: Simplify right side
    403,623.60x = 158,440,748,960.88
  5. Step 5: Solve for x
    x = 158,440,748,960.88/403,623.60
  6. Step 6: Final answer
    x = 392,545.80

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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.