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Finding the Fourth Proportional to 620,624.64, 856,967.04 and 505,921.28

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Solution

The fourth proportional to 620,624.64, 856,967.04 and 505,921.28 is: 698,583.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,624.64 : 856,967.04 = 505,921.28 : x
  2. Step 2: Convert to fraction form
    620,624.64/856,967.04 = 505,921.28/x
  3. Step 3: Cross multiply
    620,624.64x = 856,967.04 × 505,921.28
  4. Step 4: Simplify right side
    620,624.64x = 433,557,861,794.61
  5. Step 5: Solve for x
    x = 433,557,861,794.61/620,624.64
  6. Step 6: Final answer
    x = 698,583.06

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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.