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Finding the Fourth Proportional to 528,851.61, 729,810.94 and 287,129.38

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Solution

The fourth proportional to 528,851.61, 729,810.94 and 287,129.38 is: 396,236.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,851.61 : 729,810.94 = 287,129.38 : x
  2. Step 2: Convert to fraction form
    528,851.61/729,810.94 = 287,129.38/x
  3. Step 3: Cross multiply
    528,851.61x = 729,810.94 × 287,129.38
  4. Step 4: Simplify right side
    528,851.61x = 209,550,162,719.42
  5. Step 5: Solve for x
    x = 209,550,162,719.42/528,851.61
  6. Step 6: Final answer
    x = 396,236.22

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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.