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Finding the Fourth Proportional to 665,459.34, 997,763.40 and 395,515.46

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Solution

The fourth proportional to 665,459.34, 997,763.40 and 395,515.46 is: 593,020.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,459.34 : 997,763.40 = 395,515.46 : x
  2. Step 2: Convert to fraction form
    665,459.34/997,763.40 = 395,515.46/x
  3. Step 3: Cross multiply
    665,459.34x = 997,763.40 × 395,515.46
  4. Step 4: Simplify right side
    665,459.34x = 394,630,850,122.16
  5. Step 5: Solve for x
    x = 394,630,850,122.16/665,459.34
  6. Step 6: Final answer
    x = 593,020.23

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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.