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Finding the Fourth Proportional to 661,494,900.14, 912,854,051.55 and 368,139,390.38

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Solution

The fourth proportional to 661,494,900.14, 912,854,051.55 and 368,139,390.38 is: 508,027,399.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,494,900.14 : 912,854,051.55 = 368,139,390.38 : x
  2. Step 2: Convert to fraction form
    661,494,900.14/912,854,051.55 = 368,139,390.38/x
  3. Step 3: Cross multiply
    661,494,900.14x = 912,854,051.55 × 368,139,390.38
  4. Step 4: Simplify right side
    661,494,900.14x = 336,057,534,043,530,048
  5. Step 5: Solve for x
    x = 336,057,534,043,530,048/661,494,900.14
  6. Step 6: Final answer
    x = 508,027,399.72

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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.