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Finding the Fourth Proportional to 403,679.40, 605,000.70 and 245,740.20

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Solution

The fourth proportional to 403,679.40, 605,000.70 and 245,740.20 is: 368,294.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,679.40 : 605,000.70 = 245,740.20 : x
  2. Step 2: Convert to fraction form
    403,679.40/605,000.70 = 245,740.20/x
  3. Step 3: Cross multiply
    403,679.40x = 605,000.70 × 245,740.20
  4. Step 4: Simplify right side
    403,679.40x = 148,672,993,018.14
  5. Step 5: Solve for x
    x = 148,672,993,018.14/403,679.40
  6. Step 6: Final answer
    x = 368,294.72

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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.