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Finding the Fourth Proportional to 289,430.65, 399,194.67 and 253,558.36

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Solution

The fourth proportional to 289,430.65, 399,194.67 and 253,558.36 is: 349,718.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,430.65 : 399,194.67 = 253,558.36 : x
  2. Step 2: Convert to fraction form
    289,430.65/399,194.67 = 253,558.36/x
  3. Step 3: Cross multiply
    289,430.65x = 399,194.67 × 253,558.36
  4. Step 4: Simplify right side
    289,430.65x = 101,219,145,845.94
  5. Step 5: Solve for x
    x = 101,219,145,845.94/289,430.65
  6. Step 6: Final answer
    x = 349,718.13

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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.