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Finding the Fourth Proportional to 289,309.10, 399,041.79 and 248,953.28

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Solution

The fourth proportional to 289,309.10, 399,041.79 and 248,953.28 is: 343,379.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,309.10 : 399,041.79 = 248,953.28 : x
  2. Step 2: Convert to fraction form
    289,309.10/399,041.79 = 248,953.28/x
  3. Step 3: Cross multiply
    289,309.10x = 399,041.79 × 248,953.28
  4. Step 4: Simplify right side
    289,309.10x = 99,342,762,477.57
  5. Step 5: Solve for x
    x = 99,342,762,477.57/289,309.10
  6. Step 6: Final answer
    x = 343,379.32

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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.