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Finding the Fourth Proportional to 656,115.80, 905,420.04 and 369,629.60

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Solution

The fourth proportional to 656,115.80, 905,420.04 and 369,629.60 is: 510,077.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,115.80 : 905,420.04 = 369,629.60 : x
  2. Step 2: Convert to fraction form
    656,115.80/905,420.04 = 369,629.60/x
  3. Step 3: Cross multiply
    656,115.80x = 905,420.04 × 369,629.60
  4. Step 4: Simplify right side
    656,115.80x = 334,670,047,217.18
  5. Step 5: Solve for x
    x = 334,670,047,217.18/656,115.80
  6. Step 6: Final answer
    x = 510,077.71

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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.