Home / 380,811.21-570,655.26-212,099.13

Finding the Fourth Proportional to 380,811.21, 570,655.26 and 212,099.13

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Solution

The fourth proportional to 380,811.21, 570,655.26 and 212,099.13 is: 317,835.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    380,811.21 : 570,655.26 = 212,099.13 : x
  2. Step 2: Convert to fraction form
    380,811.21/570,655.26 = 212,099.13/x
  3. Step 3: Cross multiply
    380,811.21x = 570,655.26 × 212,099.13
  4. Step 4: Simplify right side
    380,811.21x = 121,035,484,175.92
  5. Step 5: Solve for x
    x = 121,035,484,175.92/380,811.21
  6. Step 6: Final answer
    x = 317,835.93

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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.