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Finding the Fourth Proportional to 386,325,306.60, 579,487,959.90 and 127,580,461.80

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Solution

The fourth proportional to 386,325,306.60, 579,487,959.90 and 127,580,461.80 is: 191,370,692.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,325,306.60 : 579,487,959.90 = 127,580,461.80 : x
  2. Step 2: Convert to fraction form
    386,325,306.60/579,487,959.90 = 127,580,461.80/x
  3. Step 3: Cross multiply
    386,325,306.60x = 579,487,959.90 × 127,580,461.80
  4. Step 4: Simplify right side
    386,325,306.60x = 73,931,341,531,581,872
  5. Step 5: Solve for x
    x = 73,931,341,531,581,872/386,325,306.60
  6. Step 6: Final answer
    x = 191,370,692.70

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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.