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Finding the Fourth Proportional to 528,655.91, 729,371.45 and 299,190.40

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Solution

The fourth proportional to 528,655.91, 729,371.45 and 299,190.40 is: 412,784.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,655.91 : 729,371.45 = 299,190.40 : x
  2. Step 2: Convert to fraction form
    528,655.91/729,371.45 = 299,190.40/x
  3. Step 3: Cross multiply
    528,655.91x = 729,371.45 × 299,190.40
  4. Step 4: Simplify right side
    528,655.91x = 218,220,932,227.22
  5. Step 5: Solve for x
    x = 218,220,932,227.22/528,655.91
  6. Step 6: Final answer
    x = 412,784.44

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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.