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Finding the Fourth Proportional to 665,040.70, 997,561.05 and 310,090.60

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Solution

The fourth proportional to 665,040.70, 997,561.05 and 310,090.60 is: 465,135.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,040.70 : 997,561.05 = 310,090.60 : x
  2. Step 2: Convert to fraction form
    665,040.70/997,561.05 = 310,090.60/x
  3. Step 3: Cross multiply
    665,040.70x = 997,561.05 × 310,090.60
  4. Step 4: Simplify right side
    665,040.70x = 309,334,304,531.13
  5. Step 5: Solve for x
    x = 309,334,304,531.13/665,040.70
  6. Step 6: Final answer
    x = 465,135.90

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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.