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Finding the Fourth Proportional to 665,205.60, 997,808.40 and 399,266.40

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Solution

The fourth proportional to 665,205.60, 997,808.40 and 399,266.40 is: 598,899.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,205.60 : 997,808.40 = 399,266.40 : x
  2. Step 2: Convert to fraction form
    665,205.60/997,808.40 = 399,266.40/x
  3. Step 3: Cross multiply
    665,205.60x = 997,808.40 × 399,266.40
  4. Step 4: Simplify right side
    665,205.60x = 398,391,367,757.76
  5. Step 5: Solve for x
    x = 398,391,367,757.76/665,205.60
  6. Step 6: Final answer
    x = 598,899.60

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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.