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Finding the Fourth Proportional to 807,910.80, 1,212,522.30 and 781,666.80

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Solution

The fourth proportional to 807,910.80, 1,212,522.30 and 781,666.80 is: 1,173,134.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    807,910.80 : 1,212,522.30 = 781,666.80 : x
  2. Step 2: Convert to fraction form
    807,910.80/1,212,522.30 = 781,666.80/x
  3. Step 3: Cross multiply
    807,910.80x = 1,212,522.30 × 781,666.80
  4. Step 4: Simplify right side
    807,910.80x = 947,788,426,169.64
  5. Step 5: Solve for x
    x = 947,788,426,169.64/807,910.80
  6. Step 6: Final answer
    x = 1,173,134.99

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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.