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Finding the Fourth Proportional to 665,021.60, 997,532.40 and 399,082.40

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Solution

The fourth proportional to 665,021.60, 997,532.40 and 399,082.40 is: 598,623.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,021.60 : 997,532.40 = 399,082.40 : x
  2. Step 2: Convert to fraction form
    665,021.60/997,532.40 = 399,082.40/x
  3. Step 3: Cross multiply
    665,021.60x = 997,532.40 × 399,082.40
  4. Step 4: Simplify right side
    665,021.60x = 398,097,624,269.76
  5. Step 5: Solve for x
    x = 398,097,624,269.76/665,021.60
  6. Step 6: Final answer
    x = 598,623.60

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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.