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Finding the Fourth Proportional to 665,086.60, 917,969.00 and 435,510.55

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Solution

The fourth proportional to 665,086.60, 917,969.00 and 435,510.55 is: 601,102.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,086.60 : 917,969.00 = 435,510.55 : x
  2. Step 2: Convert to fraction form
    665,086.60/917,969.00 = 435,510.55/x
  3. Step 3: Cross multiply
    665,086.60x = 917,969.00 × 435,510.55
  4. Step 4: Simplify right side
    665,086.60x = 399,785,182,910.82
  5. Step 5: Solve for x
    x = 399,785,182,910.82/665,086.60
  6. Step 6: Final answer
    x = 601,102.45

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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.