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Finding the Fourth Proportional to 639,069,903.90, 958,604,855.85 and 275,564,259.90

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Solution

The fourth proportional to 639,069,903.90, 958,604,855.85 and 275,564,259.90 is: 413,346,389.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,069,903.90 : 958,604,855.85 = 275,564,259.90 : x
  2. Step 2: Convert to fraction form
    639,069,903.90/958,604,855.85 = 275,564,259.90/x
  3. Step 3: Cross multiply
    639,069,903.90x = 958,604,855.85 × 275,564,259.90
  4. Step 4: Simplify right side
    639,069,903.90x = 264,157,237,638,851,424
  5. Step 5: Solve for x
    x = 264,157,237,638,851,424/639,069,903.90
  6. Step 6: Final answer
    x = 413,346,389.85

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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.