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Finding the Fourth Proportional to 640,379.20, 960,616.32 and 191,064.64

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Solution

The fourth proportional to 640,379.20, 960,616.32 and 191,064.64 is: 286,611.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,379.20 : 960,616.32 = 191,064.64 : x
  2. Step 2: Convert to fraction form
    640,379.20/960,616.32 = 191,064.64/x
  3. Step 3: Cross multiply
    640,379.20x = 960,616.32 × 191,064.64
  4. Step 4: Simplify right side
    640,379.20x = 183,539,811,358.93
  5. Step 5: Solve for x
    x = 183,539,811,358.93/640,379.20
  6. Step 6: Final answer
    x = 286,611.14

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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.