Home / 689,349.93-951,272.28-398,915.43

Finding the Fourth Proportional to 689,349.93, 951,272.28 and 398,915.43

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Solution

The fourth proportional to 689,349.93, 951,272.28 and 398,915.43 is: 550,485.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    689,349.93 : 951,272.28 = 398,915.43 : x
  2. Step 2: Convert to fraction form
    689,349.93/951,272.28 = 398,915.43/x
  3. Step 3: Cross multiply
    689,349.93x = 951,272.28 × 398,915.43
  4. Step 4: Simplify right side
    689,349.93x = 379,477,190,623.28
  5. Step 5: Solve for x
    x = 379,477,190,623.28/689,349.93
  6. Step 6: Final answer
    x = 550,485.57

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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.