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Finding the Fourth Proportional to 640,852.60, 961,278.90 and 309,076.60

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Solution

The fourth proportional to 640,852.60, 961,278.90 and 309,076.60 is: 463,614.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,852.60 : 961,278.90 = 309,076.60 : x
  2. Step 2: Convert to fraction form
    640,852.60/961,278.90 = 309,076.60/x
  3. Step 3: Cross multiply
    640,852.60x = 961,278.90 × 309,076.60
  4. Step 4: Simplify right side
    640,852.60x = 297,108,814,063.74
  5. Step 5: Solve for x
    x = 297,108,814,063.74/640,852.60
  6. Step 6: Final answer
    x = 463,614.90

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Similar ratio
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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.