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Finding the Fourth Proportional to 353,629.34, 530,438.81 and 87,389.84

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Solution

The fourth proportional to 353,629.34, 530,438.81 and 87,389.84 is: 131,083.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,629.34 : 530,438.81 = 87,389.84 : x
  2. Step 2: Convert to fraction form
    353,629.34/530,438.81 = 87,389.84/x
  3. Step 3: Cross multiply
    353,629.34x = 530,438.81 × 87,389.84
  4. Step 4: Simplify right side
    353,629.34x = 46,354,963,952.55
  5. Step 5: Solve for x
    x = 46,354,963,952.55/353,629.34
  6. Step 6: Final answer
    x = 131,083.48

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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.