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Finding the Fourth Proportional to 815,902.80, 1,223,379 and 316,683.60

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Solution

The fourth proportional to 815,902.80, 1,223,379 and 316,683.60 is: 474,840.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    815,902.80 : 1,223,379 = 316,683.60 : x
  2. Step 2: Convert to fraction form
    815,902.80/1,223,379 = 316,683.60/x
  3. Step 3: Cross multiply
    815,902.80x = 1,223,379 × 316,683.60
  4. Step 4: Simplify right side
    815,902.80x = 387,424,065,884.40
  5. Step 5: Solve for x
    x = 387,424,065,884.40/815,902.80
  6. Step 6: Final answer
    x = 474,840.96

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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.