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Finding the Fourth Proportional to 722,490,849.20, 997,064,779.41 and 404,956,963.98

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Solution

The fourth proportional to 722,490,849.20, 997,064,779.41 and 404,956,963.98 is: 558,855,972.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,490,849.20 : 997,064,779.41 = 404,956,963.98 : x
  2. Step 2: Convert to fraction form
    722,490,849.20/997,064,779.41 = 404,956,963.98/x
  3. Step 3: Cross multiply
    722,490,849.20x = 997,064,779.41 × 404,956,963.98
  4. Step 4: Simplify right side
    722,490,849.20x = 403,768,325,961,262,016
  5. Step 5: Solve for x
    x = 403,768,325,961,262,016/722,490,849.20
  6. Step 6: Final answer
    x = 558,855,972.24

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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.