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Finding the Fourth Proportional to 253,218.57, 349,435.67 and 140,038.89

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Solution

The fourth proportional to 253,218.57, 349,435.67 and 140,038.89 is: 193,250.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,218.57 : 349,435.67 = 140,038.89 : x
  2. Step 2: Convert to fraction form
    253,218.57/349,435.67 = 140,038.89/x
  3. Step 3: Cross multiply
    253,218.57x = 349,435.67 × 140,038.89
  4. Step 4: Simplify right side
    253,218.57x = 48,934,582,653.01
  5. Step 5: Solve for x
    x = 48,934,582,653.01/253,218.57
  6. Step 6: Final answer
    x = 193,250.37

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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.