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Finding the Fourth Proportional to 640,331.40, 883,691.34 and 368,440.60

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Solution

The fourth proportional to 640,331.40, 883,691.34 and 368,440.60 is: 508,467.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,331.40 : 883,691.34 = 368,440.60 : x
  2. Step 2: Convert to fraction form
    640,331.40/883,691.34 = 368,440.60/x
  3. Step 3: Cross multiply
    640,331.40x = 883,691.34 × 368,440.60
  4. Step 4: Simplify right side
    640,331.40x = 325,587,767,524.40
  5. Step 5: Solve for x
    x = 325,587,767,524.40/640,331.40
  6. Step 6: Final answer
    x = 508,467.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.