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Finding the Fourth Proportional to 528,772.05, 729,705.92 and 287,054.48

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Solution

The fourth proportional to 528,772.05, 729,705.92 and 287,054.48 is: 396,135.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,772.05 : 729,705.92 = 287,054.48 : x
  2. Step 2: Convert to fraction form
    528,772.05/729,705.92 = 287,054.48/x
  3. Step 3: Cross multiply
    528,772.05x = 729,705.92 × 287,054.48
  4. Step 4: Simplify right side
    528,772.05x = 209,465,353,807.51
  5. Step 5: Solve for x
    x = 209,465,353,807.51/528,772.05
  6. Step 6: Final answer
    x = 396,135.45

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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.