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Finding the Fourth Proportional to 518,669.44, 715,776.48 and 289,224.48

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Solution

The fourth proportional to 518,669.44, 715,776.48 and 289,224.48 is: 399,136.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,669.44 : 715,776.48 = 289,224.48 : x
  2. Step 2: Convert to fraction form
    518,669.44/715,776.48 = 289,224.48/x
  3. Step 3: Cross multiply
    518,669.44x = 715,776.48 × 289,224.48
  4. Step 4: Simplify right side
    518,669.44x = 207,020,082,908.39
  5. Step 5: Solve for x
    x = 207,020,082,908.39/518,669.44
  6. Step 6: Final answer
    x = 399,136.85

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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.