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Finding the Fourth Proportional to 665,622.90, 997,851.15 and 399,489.30

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Solution

The fourth proportional to 665,622.90, 997,851.15 and 399,489.30 is: 598,883.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,622.90 : 997,851.15 = 399,489.30 : x
  2. Step 2: Convert to fraction form
    665,622.90/997,851.15 = 399,489.30/x
  3. Step 3: Cross multiply
    665,622.90x = 997,851.15 × 399,489.30
  4. Step 4: Simplify right side
    665,622.90x = 398,630,857,417.70
  5. Step 5: Solve for x
    x = 398,630,857,417.70/665,622.90
  6. Step 6: Final answer
    x = 598,883.93

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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.