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Finding the Fourth Proportional to 385,994.20, 578,987.10 and 158,239.02

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Solution

The fourth proportional to 385,994.20, 578,987.10 and 158,239.02 is: 237,356.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,994.20 : 578,987.10 = 158,239.02 : x
  2. Step 2: Convert to fraction form
    385,994.20/578,987.10 = 158,239.02/x
  3. Step 3: Cross multiply
    385,994.20x = 578,987.10 × 158,239.02
  4. Step 4: Simplify right side
    385,994.20x = 91,618,350,433.56
  5. Step 5: Solve for x
    x = 91,618,350,433.56/385,994.20
  6. Step 6: Final answer
    x = 237,356.81

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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.