Home / 378,047.27-521,220.98-309,812.87

Finding the Fourth Proportional to 378,047.27, 521,220.98 and 309,812.87

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Solution

The fourth proportional to 378,047.27, 521,220.98 and 309,812.87 is: 427,144.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,047.27 : 521,220.98 = 309,812.87 : x
  2. Step 2: Convert to fraction form
    378,047.27/521,220.98 = 309,812.87/x
  3. Step 3: Cross multiply
    378,047.27x = 521,220.98 × 309,812.87
  4. Step 4: Simplify right side
    378,047.27x = 161,480,963,562.84
  5. Step 5: Solve for x
    x = 161,480,963,562.84/378,047.27
  6. Step 6: Final answer
    x = 427,144.91

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1.5x scale

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.