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Finding the Fourth Proportional to 528,851.68, 729,822.90 and 287,134.72

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Solution

The fourth proportional to 528,851.68, 729,822.90 and 287,134.72 is: 396,250.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,851.68 : 729,822.90 = 287,134.72 : x
  2. Step 2: Convert to fraction form
    528,851.68/729,822.90 = 287,134.72/x
  3. Step 3: Cross multiply
    528,851.68x = 729,822.90 × 287,134.72
  4. Step 4: Simplify right side
    528,851.68x = 209,557,494,041.09
  5. Step 5: Solve for x
    x = 209,557,494,041.09/528,851.68
  6. Step 6: Final answer
    x = 396,250.03

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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.