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Finding the Fourth Proportional to 917,505.80, 1,375,699.80 and 411,968.60

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Solution

The fourth proportional to 917,505.80, 1,375,699.80 and 411,968.60 is: 617,701.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    917,505.80 : 1,375,699.80 = 411,968.60 : x
  2. Step 2: Convert to fraction form
    917,505.80/1,375,699.80 = 411,968.60/x
  3. Step 3: Cross multiply
    917,505.80x = 1,375,699.80 × 411,968.60
  4. Step 4: Simplify right side
    917,505.80x = 566,745,120,626.28
  5. Step 5: Solve for x
    x = 566,745,120,626.28/917,505.80
  6. Step 6: Final answer
    x = 617,701.95

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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.