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Finding the Fourth Proportional to 640,820.20, 961,376.10 and 374,443.60

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Solution

The fourth proportional to 640,820.20, 961,376.10 and 374,443.60 is: 561,750.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,820.20 : 961,376.10 = 374,443.60 : x
  2. Step 2: Convert to fraction form
    640,820.20/961,376.10 = 374,443.60/x
  3. Step 3: Cross multiply
    640,820.20x = 961,376.10 × 374,443.60
  4. Step 4: Simplify right side
    640,820.20x = 359,981,127,837.96
  5. Step 5: Solve for x
    x = 359,981,127,837.96/640,820.20
  6. Step 6: Final answer
    x = 561,750.59

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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.