Home / 509,974,719.40-764,962,079.10-399,009,838.60

Finding the Fourth Proportional to 509,974,719.40, 764,962,079.10 and 399,009,838.60

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Solution

The fourth proportional to 509,974,719.40, 764,962,079.10 and 399,009,838.60 is: 598,514,757.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    509,974,719.40 : 764,962,079.10 = 399,009,838.60 : x
  2. Step 2: Convert to fraction form
    509,974,719.40/764,962,079.10 = 399,009,838.60/x
  3. Step 3: Cross multiply
    509,974,719.40x = 764,962,079.10 × 399,009,838.60
  4. Step 4: Simplify right side
    509,974,719.40x = 305,227,395,716,811,456
  5. Step 5: Solve for x
    x = 305,227,395,716,811,456/509,974,719.40
  6. Step 6: Final answer
    x = 598,514,757.90

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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.