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Finding the Fourth Proportional to 611,781.40, 844,234.88 and 339,866.40

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Solution

The fourth proportional to 611,781.40, 844,234.88 and 339,866.40 is: 469,002.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,781.40 : 844,234.88 = 339,866.40 : x
  2. Step 2: Convert to fraction form
    611,781.40/844,234.88 = 339,866.40/x
  3. Step 3: Cross multiply
    611,781.40x = 844,234.88 × 339,866.40
  4. Step 4: Simplify right side
    611,781.40x = 286,927,069,420.03
  5. Step 5: Solve for x
    x = 286,927,069,420.03/611,781.40
  6. Step 6: Final answer
    x = 469,002.60

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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.