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Finding the Fourth Proportional to 628,782.81, 947,410.78 and 518,923.72

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Solution

The fourth proportional to 628,782.81, 947,410.78 and 518,923.72 is: 781,881.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,782.81 : 947,410.78 = 518,923.72 : x
  2. Step 2: Convert to fraction form
    628,782.81/947,410.78 = 518,923.72/x
  3. Step 3: Cross multiply
    628,782.81x = 947,410.78 × 518,923.72
  4. Step 4: Simplify right side
    628,782.81x = 491,633,926,325.70
  5. Step 5: Solve for x
    x = 491,633,926,325.70/628,782.81
  6. Step 6: Final answer
    x = 781,881.94

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.