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Finding the Fourth Proportional to 819,807.90, 1,131,363.03 and 475,617.78

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Solution

The fourth proportional to 819,807.90, 1,131,363.03 and 475,617.78 is: 656,368.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    819,807.90 : 1,131,363.03 = 475,617.78 : x
  2. Step 2: Convert to fraction form
    819,807.90/1,131,363.03 = 475,617.78/x
  3. Step 3: Cross multiply
    819,807.90x = 1,131,363.03 × 475,617.78
  4. Step 4: Simplify right side
    819,807.90x = 538,096,372,702.67
  5. Step 5: Solve for x
    x = 538,096,372,702.67/819,807.90
  6. Step 6: Final answer
    x = 656,368.86

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.