Home / 528,856.70-729,826.05-287,139.43

Finding the Fourth Proportional to 528,856.70, 729,826.05 and 287,139.43

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Solution

The fourth proportional to 528,856.70, 729,826.05 and 287,139.43 is: 396,254.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,856.70 : 729,826.05 = 287,139.43 : x
  2. Step 2: Convert to fraction form
    528,856.70/729,826.05 = 287,139.43/x
  3. Step 3: Cross multiply
    528,856.70x = 729,826.05 × 287,139.43
  4. Step 4: Simplify right side
    528,856.70x = 209,561,836,370.05
  5. Step 5: Solve for x
    x = 209,561,836,370.05/528,856.70
  6. Step 6: Final answer
    x = 396,254.48

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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.