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Finding the Fourth Proportional to 385,611.30, 579,108.15 and 280,548.90

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Solution

The fourth proportional to 385,611.30, 579,108.15 and 280,548.90 is: 421,326.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,611.30 : 579,108.15 = 280,548.90 : x
  2. Step 2: Convert to fraction form
    385,611.30/579,108.15 = 280,548.90/x
  3. Step 3: Cross multiply
    385,611.30x = 579,108.15 × 280,548.90
  4. Step 4: Simplify right side
    385,611.30x = 162,468,154,463.54
  5. Step 5: Solve for x
    x = 162,468,154,463.54/385,611.30
  6. Step 6: Final answer
    x = 421,326.23

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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.