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Finding the Fourth Proportional to 403,420.20, 605,130.30 and 262,415.40

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Solution

The fourth proportional to 403,420.20, 605,130.30 and 262,415.40 is: 393,623.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,420.20 : 605,130.30 = 262,415.40 : x
  2. Step 2: Convert to fraction form
    403,420.20/605,130.30 = 262,415.40/x
  3. Step 3: Cross multiply
    403,420.20x = 605,130.30 × 262,415.40
  4. Step 4: Simplify right side
    403,420.20x = 158,795,509,726.62
  5. Step 5: Solve for x
    x = 158,795,509,726.62/403,420.20
  6. Step 6: Final answer
    x = 393,623.10

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.