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Finding the Fourth Proportional to 313,385.12, 470,129.52 and 155,618.72

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Solution

The fourth proportional to 313,385.12, 470,129.52 and 155,618.72 is: 233,453.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    313,385.12 : 470,129.52 = 155,618.72 : x
  2. Step 2: Convert to fraction form
    313,385.12/470,129.52 = 155,618.72/x
  3. Step 3: Cross multiply
    313,385.12x = 470,129.52 × 155,618.72
  4. Step 4: Simplify right side
    313,385.12x = 73,160,954,136.61
  5. Step 5: Solve for x
    x = 73,160,954,136.61/313,385.12
  6. Step 6: Final answer
    x = 233,453.82

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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.