Home / 821,280.21-1,231,706.48-347,721.81

Finding the Fourth Proportional to 821,280.21, 1,231,706.48 and 347,721.81

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Solution

The fourth proportional to 821,280.21, 1,231,706.48 and 347,721.81 is: 521,492.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    821,280.21 : 1,231,706.48 = 347,721.81 : x
  2. Step 2: Convert to fraction form
    821,280.21/1,231,706.48 = 347,721.81/x
  3. Step 3: Cross multiply
    821,280.21x = 1,231,706.48 × 347,721.81
  4. Step 4: Simplify right side
    821,280.21x = 428,291,204,875.72
  5. Step 5: Solve for x
    x = 428,291,204,875.72/821,280.21
  6. Step 6: Final answer
    x = 521,492.18

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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.