Home / 429,824.40-644,736.60-388,490.10

Finding the Fourth Proportional to 429,824.40, 644,736.60 and 388,490.10

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Solution

The fourth proportional to 429,824.40, 644,736.60 and 388,490.10 is: 582,735.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,824.40 : 644,736.60 = 388,490.10 : x
  2. Step 2: Convert to fraction form
    429,824.40/644,736.60 = 388,490.10/x
  3. Step 3: Cross multiply
    429,824.40x = 644,736.60 × 388,490.10
  4. Step 4: Simplify right side
    429,824.40x = 250,473,786,207.66
  5. Step 5: Solve for x
    x = 250,473,786,207.66/429,824.40
  6. Step 6: Final answer
    x = 582,735.15

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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.