Home / 378,173.61-521,905.40-231,061.45

Finding the Fourth Proportional to 378,173.61, 521,905.40 and 231,061.45

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Solution

The fourth proportional to 378,173.61, 521,905.40 and 231,061.45 is: 318,880.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,173.61 : 521,905.40 = 231,061.45 : x
  2. Step 2: Convert to fraction form
    378,173.61/521,905.40 = 231,061.45/x
  3. Step 3: Cross multiply
    378,173.61x = 521,905.40 × 231,061.45
  4. Step 4: Simplify right side
    378,173.61x = 120,592,217,331.52
  5. Step 5: Solve for x
    x = 120,592,217,331.52/378,173.61
  6. Step 6: Final answer
    x = 318,880.58

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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.