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Finding the Fourth Proportional to 639,068,648.40, 958,602,972.60 and 275,563,004.40

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Solution

The fourth proportional to 639,068,648.40, 958,602,972.60 and 275,563,004.40 is: 413,344,506.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,068,648.40 : 958,602,972.60 = 275,563,004.40 : x
  2. Step 2: Convert to fraction form
    639,068,648.40/958,602,972.60 = 275,563,004.40/x
  3. Step 3: Cross multiply
    639,068,648.40x = 958,602,972.60 × 275,563,004.40
  4. Step 4: Simplify right side
    639,068,648.40x = 264,155,515,156,426,848
  5. Step 5: Solve for x
    x = 264,155,515,156,426,848/639,068,648.40
  6. Step 6: Final answer
    x = 413,344,506.60

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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.