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Finding the Fourth Proportional to 353,817.72, 530,628 and 117,178.86

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Solution

The fourth proportional to 353,817.72, 530,628 and 117,178.86 is: 175,735.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,817.72 : 530,628 = 117,178.86 : x
  2. Step 2: Convert to fraction form
    353,817.72/530,628 = 117,178.86/x
  3. Step 3: Cross multiply
    353,817.72x = 530,628 × 117,178.86
  4. Step 4: Simplify right side
    353,817.72x = 62,178,384,124.08
  5. Step 5: Solve for x
    x = 62,178,384,124.08/353,817.72
  6. Step 6: Final answer
    x = 175,735.64

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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.