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Finding the Fourth Proportional to 258,407.82, 356,508.32 and 156,396.21

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Solution

The fourth proportional to 258,407.82, 356,508.32 and 156,396.21 is: 215,769.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,407.82 : 356,508.32 = 156,396.21 : x
  2. Step 2: Convert to fraction form
    258,407.82/356,508.32 = 156,396.21/x
  3. Step 3: Cross multiply
    258,407.82x = 356,508.32 × 156,396.21
  4. Step 4: Simplify right side
    258,407.82x = 55,756,549,299.49
  5. Step 5: Solve for x
    x = 55,756,549,299.49/258,407.82
  6. Step 6: Final answer
    x = 215,769.59

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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.