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Finding the Fourth Proportional to 528,873.40, 729,845.34 and 287,156.14

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Solution

The fourth proportional to 528,873.40, 729,845.34 and 287,156.14 is: 396,275.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,873.40 : 729,845.34 = 287,156.14 : x
  2. Step 2: Convert to fraction form
    528,873.40/729,845.34 = 287,156.14/x
  3. Step 3: Cross multiply
    528,873.40x = 729,845.34 × 287,156.14
  4. Step 4: Simplify right side
    528,873.40x = 209,579,567,729.94
  5. Step 5: Solve for x
    x = 209,579,567,729.94/528,873.40
  6. Step 6: Final answer
    x = 396,275.49

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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.