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Finding the Fourth Proportional to 917,321.80, 1,375,326.60 and 411,468.70

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Solution

The fourth proportional to 917,321.80, 1,375,326.60 and 411,468.70 is: 616,908.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    917,321.80 : 1,375,326.60 = 411,468.70 : x
  2. Step 2: Convert to fraction form
    917,321.80/1,375,326.60 = 411,468.70/x
  3. Step 3: Cross multiply
    917,321.80x = 1,375,326.60 × 411,468.70
  4. Step 4: Simplify right side
    917,321.80x = 565,903,848,177.42
  5. Step 5: Solve for x
    x = 565,903,848,177.42/917,321.80
  6. Step 6: Final answer
    x = 616,908.75

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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.