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Finding the Fourth Proportional to 521,621.51, 782,549.51 and 281,730.29

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Solution

The fourth proportional to 521,621.51, 782,549.51 and 281,730.29 is: 422,658.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,621.51 : 782,549.51 = 281,730.29 : x
  2. Step 2: Convert to fraction form
    521,621.51/782,549.51 = 281,730.29/x
  3. Step 3: Cross multiply
    521,621.51x = 782,549.51 × 281,730.29
  4. Step 4: Simplify right side
    521,621.51x = 220,467,895,070.26
  5. Step 5: Solve for x
    x = 220,467,895,070.26/521,621.51
  6. Step 6: Final answer
    x = 422,658.75

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.