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Finding the Fourth Proportional to 640,821.20, 961,377.60 and 374,444.60

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Solution

The fourth proportional to 640,821.20, 961,377.60 and 374,444.60 is: 561,752.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,821.20 : 961,377.60 = 374,444.60 : x
  2. Step 2: Convert to fraction form
    640,821.20/961,377.60 = 374,444.60/x
  3. Step 3: Cross multiply
    640,821.20x = 961,377.60 × 374,444.60
  4. Step 4: Simplify right side
    640,821.20x = 359,982,650,880.96
  5. Step 5: Solve for x
    x = 359,982,650,880.96/640,821.20
  6. Step 6: Final answer
    x = 561,752.09

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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.