Home / 509,319.40-764,795.10-405,005.80

Finding the Fourth Proportional to 509,319.40, 764,795.10 and 405,005.80

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Solution

The fourth proportional to 509,319.40, 764,795.10 and 405,005.80 is: 608,157.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    509,319.40 : 764,795.10 = 405,005.80 : x
  2. Step 2: Convert to fraction form
    509,319.40/764,795.10 = 405,005.80/x
  3. Step 3: Cross multiply
    509,319.40x = 764,795.10 × 405,005.80
  4. Step 4: Simplify right side
    509,319.40x = 309,746,451,311.58
  5. Step 5: Solve for x
    x = 309,746,451,311.58/509,319.40
  6. Step 6: Final answer
    x = 608,157.58

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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.