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Finding the Fourth Proportional to 528,665.99, 729,539.50 and 286,943.43

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Solution

The fourth proportional to 528,665.99, 729,539.50 and 286,943.43 is: 395,971.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,665.99 : 729,539.50 = 286,943.43 : x
  2. Step 2: Convert to fraction form
    528,665.99/729,539.50 = 286,943.43/x
  3. Step 3: Cross multiply
    528,665.99x = 729,539.50 × 286,943.43
  4. Step 4: Simplify right side
    528,665.99x = 209,336,566,450.49
  5. Step 5: Solve for x
    x = 209,336,566,450.49/528,665.99
  6. Step 6: Final answer
    x = 395,971.31

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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.