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Finding the Fourth Proportional to 528,945.67, 729,946.50 and 287,232.28

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Solution

The fourth proportional to 528,945.67, 729,946.50 and 287,232.28 is: 396,381.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,945.67 : 729,946.50 = 287,232.28 : x
  2. Step 2: Convert to fraction form
    528,945.67/729,946.50 = 287,232.28/x
  3. Step 3: Cross multiply
    528,945.67x = 729,946.50 × 287,232.28
  4. Step 4: Simplify right side
    528,945.67x = 209,664,197,473.02
  5. Step 5: Solve for x
    x = 209,664,197,473.02/528,945.67
  6. Step 6: Final answer
    x = 396,381.35

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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.