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Finding the Fourth Proportional to 427,867.83, 640,855.72 and 292,611.35

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Solution

The fourth proportional to 427,867.83, 640,855.72 and 292,611.35 is: 438,270.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,867.83 : 640,855.72 = 292,611.35 : x
  2. Step 2: Convert to fraction form
    427,867.83/640,855.72 = 292,611.35/x
  3. Step 3: Cross multiply
    427,867.83x = 640,855.72 × 292,611.35
  4. Step 4: Simplify right side
    427,867.83x = 187,521,659,675.42
  5. Step 5: Solve for x
    x = 187,521,659,675.42/427,867.83
  6. Step 6: Final answer
    x = 438,270.06

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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.