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Finding the Fourth Proportional to 528,857.42, 729,819.06 and 287,135.10

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Solution

The fourth proportional to 528,857.42, 729,819.06 and 287,135.10 is: 396,244.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,857.42 : 729,819.06 = 287,135.10 : x
  2. Step 2: Convert to fraction form
    528,857.42/729,819.06 = 287,135.10/x
  3. Step 3: Cross multiply
    528,857.42x = 729,819.06 × 287,135.10
  4. Step 4: Simplify right side
    528,857.42x = 209,556,668,775.01
  5. Step 5: Solve for x
    x = 209,556,668,775.01/528,857.42
  6. Step 6: Final answer
    x = 396,244.17

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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.