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Finding the Fourth Proportional to 415,012.80, 621,136.80 and 365,246.40

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Solution

The fourth proportional to 415,012.80, 621,136.80 and 365,246.40 is: 546,652.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    415,012.80 : 621,136.80 = 365,246.40 : x
  2. Step 2: Convert to fraction form
    415,012.80/621,136.80 = 365,246.40/x
  3. Step 3: Cross multiply
    415,012.80x = 621,136.80 × 365,246.40
  4. Step 4: Simplify right side
    415,012.80x = 226,867,980,107.52
  5. Step 5: Solve for x
    x = 226,867,980,107.52/415,012.80
  6. Step 6: Final answer
    x = 546,652.97

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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.