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Finding the Fourth Proportional to 403,406.70, 605,110.05 and 262,401.90

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Solution

The fourth proportional to 403,406.70, 605,110.05 and 262,401.90 is: 393,602.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,406.70 : 605,110.05 = 262,401.90 : x
  2. Step 2: Convert to fraction form
    403,406.70/605,110.05 = 262,401.90/x
  3. Step 3: Cross multiply
    403,406.70x = 605,110.05 × 262,401.90
  4. Step 4: Simplify right side
    403,406.70x = 158,782,026,829.10
  5. Step 5: Solve for x
    x = 158,782,026,829.10/403,406.70
  6. Step 6: Final answer
    x = 393,602.85

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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.