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Finding the Fourth Proportional to 604,583.40, 908,843.40 and 428,311.20

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Solution

The fourth proportional to 604,583.40, 908,843.40 and 428,311.20 is: 643,861.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    604,583.40 : 908,843.40 = 428,311.20 : x
  2. Step 2: Convert to fraction form
    604,583.40/908,843.40 = 428,311.20/x
  3. Step 3: Cross multiply
    604,583.40x = 908,843.40 × 428,311.20
  4. Step 4: Simplify right side
    604,583.40x = 389,267,807,266.08
  5. Step 5: Solve for x
    x = 389,267,807,266.08/604,583.40
  6. Step 6: Final answer
    x = 643,861.22

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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.