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Finding the Fourth Proportional to 640,467.91, 960,868.31 and 191,188.86

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Solution

The fourth proportional to 640,467.91, 960,868.31 and 191,188.86 is: 286,832.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,467.91 : 960,868.31 = 191,188.86 : x
  2. Step 2: Convert to fraction form
    640,467.91/960,868.31 = 191,188.86/x
  3. Step 3: Cross multiply
    640,467.91x = 960,868.31 × 191,188.86
  4. Step 4: Simplify right side
    640,467.91x = 183,707,312,239.83
  5. Step 5: Solve for x
    x = 183,707,312,239.83/640,467.91
  6. Step 6: Final answer
    x = 286,832.97

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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.