Home / 438,431.40-656,334.90-391,192.20

Finding the Fourth Proportional to 438,431.40, 656,334.90 and 391,192.20

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Solution

The fourth proportional to 438,431.40, 656,334.90 and 391,192.20 is: 585,617.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,431.40 : 656,334.90 = 391,192.20 : x
  2. Step 2: Convert to fraction form
    438,431.40/656,334.90 = 391,192.20/x
  3. Step 3: Cross multiply
    438,431.40x = 656,334.90 × 391,192.20
  4. Step 4: Simplify right side
    438,431.40x = 256,753,093,467.78
  5. Step 5: Solve for x
    x = 256,753,093,467.78/438,431.40
  6. Step 6: Final answer
    x = 585,617.48

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1.5x scale

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.