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Finding the Fourth Proportional to 643,259.01, 887,803.70 and 356,871.36

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Solution

The fourth proportional to 643,259.01, 887,803.70 and 356,871.36 is: 492,541.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,259.01 : 887,803.70 = 356,871.36 : x
  2. Step 2: Convert to fraction form
    643,259.01/887,803.70 = 356,871.36/x
  3. Step 3: Cross multiply
    643,259.01x = 887,803.70 × 356,871.36
  4. Step 4: Simplify right side
    643,259.01x = 316,831,712,047.68
  5. Step 5: Solve for x
    x = 316,831,712,047.68/643,259.01
  6. Step 6: Final answer
    x = 492,541.43

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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.