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Finding the Fourth Proportional to 788,692.80, 1,183,039.20 and 781,694.40

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Solution

The fourth proportional to 788,692.80, 1,183,039.20 and 781,694.40 is: 1,172,541.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    788,692.80 : 1,183,039.20 = 781,694.40 : x
  2. Step 2: Convert to fraction form
    788,692.80/1,183,039.20 = 781,694.40/x
  3. Step 3: Cross multiply
    788,692.80x = 1,183,039.20 × 781,694.40
  4. Step 4: Simplify right side
    788,692.80x = 924,775,117,620.48
  5. Step 5: Solve for x
    x = 924,775,117,620.48/788,692.80
  6. Step 6: Final answer
    x = 1,172,541.60

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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.