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Finding the Fourth Proportional to 347,136.87, 478,911.91 and 217,999.38

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Solution

The fourth proportional to 347,136.87, 478,911.91 and 217,999.38 is: 300,753.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    347,136.87 : 478,911.91 = 217,999.38 : x
  2. Step 2: Convert to fraction form
    347,136.87/478,911.91 = 217,999.38/x
  3. Step 3: Cross multiply
    347,136.87x = 478,911.91 × 217,999.38
  4. Step 4: Simplify right side
    347,136.87x = 104,402,499,454.62
  5. Step 5: Solve for x
    x = 104,402,499,454.62/347,136.87
  6. Step 6: Final answer
    x = 300,753.13

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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.