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Finding the Fourth Proportional to 290,555.34, 400,039.47 and 247,942.86

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Solution

The fourth proportional to 290,555.34, 400,039.47 and 247,942.86 is: 341,370.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,555.34 : 400,039.47 = 247,942.86 : x
  2. Step 2: Convert to fraction form
    290,555.34/400,039.47 = 247,942.86/x
  3. Step 3: Cross multiply
    290,555.34x = 400,039.47 × 247,942.86
  4. Step 4: Simplify right side
    290,555.34x = 99,186,930,304.68
  5. Step 5: Solve for x
    x = 99,186,930,304.68/290,555.34
  6. Step 6: Final answer
    x = 341,370.19

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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.