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Finding the Fourth Proportional to 385,611.72, 578,444.52 and 119,337.20

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Solution

The fourth proportional to 385,611.72, 578,444.52 and 119,337.20 is: 179,014.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,611.72 : 578,444.52 = 119,337.20 : x
  2. Step 2: Convert to fraction form
    385,611.72/578,444.52 = 119,337.20/x
  3. Step 3: Cross multiply
    385,611.72x = 578,444.52 × 119,337.20
  4. Step 4: Simplify right side
    385,611.72x = 69,029,949,372.14
  5. Step 5: Solve for x
    x = 69,029,949,372.14/385,611.72
  6. Step 6: Final answer
    x = 179,014.14

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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.