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Finding the Fourth Proportional to 353,211.57, 488,715.52 and 307,983.80

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Solution

The fourth proportional to 353,211.57, 488,715.52 and 307,983.80 is: 426,136.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,211.57 : 488,715.52 = 307,983.80 : x
  2. Step 2: Convert to fraction form
    353,211.57/488,715.52 = 307,983.80/x
  3. Step 3: Cross multiply
    353,211.57x = 488,715.52 × 307,983.80
  4. Step 4: Simplify right side
    353,211.57x = 150,516,462,968.58
  5. Step 5: Solve for x
    x = 150,516,462,968.58/353,211.57
  6. Step 6: Final answer
    x = 426,136.84

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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.