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Finding the Fourth Proportional to 639,841,765.89, 959,714,782.65 and 230,897,901.81

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Solution

The fourth proportional to 639,841,765.89, 959,714,782.65 and 230,897,901.81 is: 346,329,579.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,841,765.89 : 959,714,782.65 = 230,897,901.81 : x
  2. Step 2: Convert to fraction form
    639,841,765.89/959,714,782.65 = 230,897,901.81/x
  3. Step 3: Cross multiply
    639,841,765.89x = 959,714,782.65 × 230,897,901.81
  4. Step 4: Simplify right side
    639,841,765.89x = 221,596,129,649,925,184
  5. Step 5: Solve for x
    x = 221,596,129,649,925,184/639,841,765.89
  6. Step 6: Final answer
    x = 346,329,579.38

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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.