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Finding the Fourth Proportional to 528,856.30, 729,817.51 and 287,133.98

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Solution

The fourth proportional to 528,856.30, 729,817.51 and 287,133.98 is: 396,242.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,856.30 : 729,817.51 = 287,133.98 : x
  2. Step 2: Convert to fraction form
    528,856.30/729,817.51 = 287,133.98/x
  3. Step 3: Cross multiply
    528,856.30x = 729,817.51 × 287,133.98
  4. Step 4: Simplify right side
    528,856.30x = 209,555,401,235.23
  5. Step 5: Solve for x
    x = 209,555,401,235.23/528,856.30
  6. Step 6: Final answer
    x = 396,242.61

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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.