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Finding the Fourth Proportional to 816,855,369.21, 1,127,267,603.87 and 445,579,051.77

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Solution

The fourth proportional to 816,855,369.21, 1,127,267,603.87 and 445,579,051.77 is: 614,903,015.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    816,855,369.21 : 1,127,267,603.87 = 445,579,051.77 : x
  2. Step 2: Convert to fraction form
    816,855,369.21/1,127,267,603.87 = 445,579,051.77/x
  3. Step 3: Cross multiply
    816,855,369.21x = 1,127,267,603.87 × 445,579,051.77
  4. Step 4: Simplify right side
    816,855,369.21x = 502,286,830,021,206,656
  5. Step 5: Solve for x
    x = 502,286,830,021,206,656/816,855,369.21
  6. Step 6: Final answer
    x = 614,903,015.83

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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.