Home / 665,341.20-918,172.28-378,861.52

Finding the Fourth Proportional to 665,341.20, 918,172.28 and 378,861.52

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Solution

The fourth proportional to 665,341.20, 918,172.28 and 378,861.52 is: 522,829.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,341.20 : 918,172.28 = 378,861.52 : x
  2. Step 2: Convert to fraction form
    665,341.20/918,172.28 = 378,861.52/x
  3. Step 3: Cross multiply
    665,341.20x = 918,172.28 × 378,861.52
  4. Step 4: Simplify right side
    665,341.20x = 347,860,145,622.67
  5. Step 5: Solve for x
    x = 347,860,145,622.67/665,341.20
  6. Step 6: Final answer
    x = 522,829.71

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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.