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Finding the Fourth Proportional to 660,861,905.15, 912,006,630.06 and 363,511,808.30

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Solution

The fourth proportional to 660,861,905.15, 912,006,630.06 and 363,511,808.30 is: 501,655,756.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,861,905.15 : 912,006,630.06 = 363,511,808.30 : x
  2. Step 2: Convert to fraction form
    660,861,905.15/912,006,630.06 = 363,511,808.30/x
  3. Step 3: Cross multiply
    660,861,905.15x = 912,006,630.06 × 363,511,808.30
  4. Step 4: Simplify right side
    660,861,905.15x = 331,525,179,274,699,712
  5. Step 5: Solve for x
    x = 331,525,179,274,699,712/660,861,905.15
  6. Step 6: Final answer
    x = 501,655,756.96

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.