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Finding the Fourth Proportional to 261,660,339.60, 391,640,203.80 and 261,660,339.60

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Solution

The fourth proportional to 261,660,339.60, 391,640,203.80 and 261,660,339.60 is: 391,640,203.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,660,339.60 : 391,640,203.80 = 261,660,339.60 : x
  2. Step 2: Convert to fraction form
    261,660,339.60/391,640,203.80 = 261,660,339.60/x
  3. Step 3: Cross multiply
    261,660,339.60x = 391,640,203.80 × 261,660,339.60
  4. Step 4: Simplify right side
    261,660,339.60x = 102,476,708,727,321,216
  5. Step 5: Solve for x
    x = 102,476,708,727,321,216/261,660,339.60
  6. Step 6: Final answer
    x = 391,640,203.80

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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.