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Finding the Fourth Proportional to 640,331.88, 960,515.10 and 167,006.76

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Solution

The fourth proportional to 640,331.88, 960,515.10 and 167,006.76 is: 250,514.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,331.88 : 960,515.10 = 167,006.76 : x
  2. Step 2: Convert to fraction form
    640,331.88/960,515.10 = 167,006.76/x
  3. Step 3: Cross multiply
    640,331.88x = 960,515.10 × 167,006.76
  4. Step 4: Simplify right side
    640,331.88x = 160,412,514,782.08
  5. Step 5: Solve for x
    x = 160,412,514,782.08/640,331.88
  6. Step 6: Final answer
    x = 250,514.65

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1.5x scale

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.