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Finding the Fourth Proportional to 878,461.80, 1,317,692.70 and 869,130.60

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Solution

The fourth proportional to 878,461.80, 1,317,692.70 and 869,130.60 is: 1,303,695.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    878,461.80 : 1,317,692.70 = 869,130.60 : x
  2. Step 2: Convert to fraction form
    878,461.80/1,317,692.70 = 869,130.60/x
  3. Step 3: Cross multiply
    878,461.80x = 1,317,692.70 × 869,130.60
  4. Step 4: Simplify right side
    878,461.80x = 1,145,247,046,966.62
  5. Step 5: Solve for x
    x = 1,145,247,046,966.62/878,461.80
  6. Step 6: Final answer
    x = 1,303,695.90

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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.