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Finding the Fourth Proportional to 380,613.80, 570,699.29 and 143,974.94

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Solution

The fourth proportional to 380,613.80, 570,699.29 and 143,974.94 is: 215,878.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    380,613.80 : 570,699.29 = 143,974.94 : x
  2. Step 2: Convert to fraction form
    380,613.80/570,699.29 = 143,974.94/x
  3. Step 3: Cross multiply
    380,613.80x = 570,699.29 × 143,974.94
  4. Step 4: Simplify right side
    380,613.80x = 82,166,393,542.23
  5. Step 5: Solve for x
    x = 82,166,393,542.23/380,613.80
  6. Step 6: Final answer
    x = 215,878.65

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1.5x scale

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.