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Finding the Fourth Proportional to 663,552,402.80, 995,328,604.20 and 405,563,385.20

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Solution

The fourth proportional to 663,552,402.80, 995,328,604.20 and 405,563,385.20 is: 608,345,077.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,552,402.80 : 995,328,604.20 = 405,563,385.20 : x
  2. Step 2: Convert to fraction form
    663,552,402.80/995,328,604.20 = 405,563,385.20/x
  3. Step 3: Cross multiply
    663,552,402.80x = 995,328,604.20 × 405,563,385.20
  4. Step 4: Simplify right side
    663,552,402.80x = 403,668,838,105,742,976
  5. Step 5: Solve for x
    x = 403,668,838,105,742,976/663,552,402.80
  6. Step 6: Final answer
    x = 608,345,077.80

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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.