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Finding the Fourth Proportional to 768,083.20, 1,076,422.40 and 768,083.20

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Solution

The fourth proportional to 768,083.20, 1,076,422.40 and 768,083.20 is: 1,076,422.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    768,083.20 : 1,076,422.40 = 768,083.20 : x
  2. Step 2: Convert to fraction form
    768,083.20/1,076,422.40 = 768,083.20/x
  3. Step 3: Cross multiply
    768,083.20x = 1,076,422.40 × 768,083.20
  4. Step 4: Simplify right side
    768,083.20x = 826,781,961,543.68
  5. Step 5: Solve for x
    x = 826,781,961,543.68/768,083.20
  6. Step 6: Final answer
    x = 1,076,422.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.