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Finding the Fourth Proportional to 591,294.12, 815,985.63 and 319,361.91

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Solution

The fourth proportional to 591,294.12, 815,985.63 and 319,361.91 is: 440,719.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    591,294.12 : 815,985.63 = 319,361.91 : x
  2. Step 2: Convert to fraction form
    591,294.12/815,985.63 = 319,361.91/x
  3. Step 3: Cross multiply
    591,294.12x = 815,985.63 × 319,361.91
  4. Step 4: Simplify right side
    591,294.12x = 260,594,729,329.35
  5. Step 5: Solve for x
    x = 260,594,729,329.35/591,294.12
  6. Step 6: Final answer
    x = 440,719.30

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.