Home / 427,310,215.20-640,965,322.80-398,644,768.80

Finding the Fourth Proportional to 427,310,215.20, 640,965,322.80 and 398,644,768.80

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Solution

The fourth proportional to 427,310,215.20, 640,965,322.80 and 398,644,768.80 is: 597,967,153.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,310,215.20 : 640,965,322.80 = 398,644,768.80 : x
  2. Step 2: Convert to fraction form
    427,310,215.20/640,965,322.80 = 398,644,768.80/x
  3. Step 3: Cross multiply
    427,310,215.20x = 640,965,322.80 × 398,644,768.80
  4. Step 4: Simplify right side
    427,310,215.20x = 255,517,472,916,423,360
  5. Step 5: Solve for x
    x = 255,517,472,916,423,360/427,310,215.20
  6. Step 6: Final answer
    x = 597,967,153.20

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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.