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Finding the Fourth Proportional to 885,807.90, 1,328,452.65 and 317,123.10

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Solution

The fourth proportional to 885,807.90, 1,328,452.65 and 317,123.10 is: 475,591.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    885,807.90 : 1,328,452.65 = 317,123.10 : x
  2. Step 2: Convert to fraction form
    885,807.90/1,328,452.65 = 317,123.10/x
  3. Step 3: Cross multiply
    885,807.90x = 1,328,452.65 × 317,123.10
  4. Step 4: Simplify right side
    885,807.90x = 421,283,022,571.22
  5. Step 5: Solve for x
    x = 421,283,022,571.22/885,807.90
  6. Step 6: Final answer
    x = 475,591.86

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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.