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Finding the Fourth Proportional to 639,068,649.40, 958,602,974.10 and 275,563,005.40

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Solution

The fourth proportional to 639,068,649.40, 958,602,974.10 and 275,563,005.40 is: 413,344,508.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,068,649.40 : 958,602,974.10 = 275,563,005.40 : x
  2. Step 2: Convert to fraction form
    639,068,649.40/958,602,974.10 = 275,563,005.40/x
  3. Step 3: Cross multiply
    639,068,649.40x = 958,602,974.10 × 275,563,005.40
  4. Step 4: Simplify right side
    639,068,649.40x = 264,155,516,528,374,336
  5. Step 5: Solve for x
    x = 264,155,516,528,374,336/639,068,649.40
  6. Step 6: Final answer
    x = 413,344,508.10

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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.