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Finding the Fourth Proportional to 643,888.85, 888,606.86 and 371,968.20

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Solution

The fourth proportional to 643,888.85, 888,606.86 and 371,968.20 is: 513,339.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,888.85 : 888,606.86 = 371,968.20 : x
  2. Step 2: Convert to fraction form
    643,888.85/888,606.86 = 371,968.20/x
  3. Step 3: Cross multiply
    643,888.85x = 888,606.86 × 371,968.20
  4. Step 4: Simplify right side
    643,888.85x = 330,533,492,362.01
  5. Step 5: Solve for x
    x = 330,533,492,362.01/643,888.85
  6. Step 6: Final answer
    x = 513,339.37

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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.