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Finding the Fourth Proportional to 528,790.68, 729,738.72 and 287,073.72

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Solution

The fourth proportional to 528,790.68, 729,738.72 and 287,073.72 is: 396,165.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,790.68 : 729,738.72 = 287,073.72 : x
  2. Step 2: Convert to fraction form
    528,790.68/729,738.72 = 287,073.72/x
  3. Step 3: Cross multiply
    528,790.68x = 729,738.72 × 287,073.72
  4. Step 4: Simplify right side
    528,790.68x = 209,488,808,978.44
  5. Step 5: Solve for x
    x = 209,488,808,978.44/528,790.68
  6. Step 6: Final answer
    x = 396,165.85

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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.