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Finding the Fourth Proportional to 528,764.32, 729,694.02 and 287,047

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Solution

The fourth proportional to 528,764.32, 729,694.02 and 287,047 is: 396,124.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,764.32 : 729,694.02 = 287,047 : x
  2. Step 2: Convert to fraction form
    528,764.32/729,694.02 = 287,047/x
  3. Step 3: Cross multiply
    528,764.32x = 729,694.02 × 287,047
  4. Step 4: Simplify right side
    528,764.32x = 209,456,479,358.94
  5. Step 5: Solve for x
    x = 209,456,479,358.94/528,764.32
  6. Step 6: Final answer
    x = 396,124.46

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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.