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Finding the Fourth Proportional to 885,830.88, 1,329,212.88 and 387,544.80

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Solution

The fourth proportional to 885,830.88, 1,329,212.88 and 387,544.80 is: 581,521.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    885,830.88 : 1,329,212.88 = 387,544.80 : x
  2. Step 2: Convert to fraction form
    885,830.88/1,329,212.88 = 387,544.80/x
  3. Step 3: Cross multiply
    885,830.88x = 1,329,212.88 × 387,544.80
  4. Step 4: Simplify right side
    885,830.88x = 515,129,539,737.02
  5. Step 5: Solve for x
    x = 515,129,539,737.02/885,830.88
  6. Step 6: Final answer
    x = 581,521.32

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.