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Finding the Fourth Proportional to 618,971,619.48, 854,187,887.52 and 354,648,306.30

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Solution

The fourth proportional to 618,971,619.48, 854,187,887.52 and 354,648,306.30 is: 489,418,703.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,971,619.48 : 854,187,887.52 = 354,648,306.30 : x
  2. Step 2: Convert to fraction form
    618,971,619.48/854,187,887.52 = 354,648,306.30/x
  3. Step 3: Cross multiply
    618,971,619.48x = 854,187,887.52 × 354,648,306.30
  4. Step 4: Simplify right side
    618,971,619.48x = 302,936,287,570,942,912
  5. Step 5: Solve for x
    x = 302,936,287,570,942,912/618,971,619.48
  6. Step 6: Final answer
    x = 489,418,703.60

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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.