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Finding the Fourth Proportional to 528,871.68, 729,850.50 and 287,154.72

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Solution

The fourth proportional to 528,871.68, 729,850.50 and 287,154.72 is: 396,277.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,871.68 : 729,850.50 = 287,154.72 : x
  2. Step 2: Convert to fraction form
    528,871.68/729,850.50 = 287,154.72/x
  3. Step 3: Cross multiply
    528,871.68x = 729,850.50 × 287,154.72
  4. Step 4: Simplify right side
    528,871.68x = 209,580,015,969.36
  5. Step 5: Solve for x
    x = 209,580,015,969.36/528,871.68
  6. Step 6: Final answer
    x = 396,277.63

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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.