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Finding the Fourth Proportional to 302,939.70, 455,393.70 and 259,637.10

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Solution

The fourth proportional to 302,939.70, 455,393.70 and 259,637.10 is: 390,299.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    302,939.70 : 455,393.70 = 259,637.10 : x
  2. Step 2: Convert to fraction form
    302,939.70/455,393.70 = 259,637.10/x
  3. Step 3: Cross multiply
    302,939.70x = 455,393.70 × 259,637.10
  4. Step 4: Simplify right side
    302,939.70x = 118,237,099,626.27
  5. Step 5: Solve for x
    x = 118,237,099,626.27/302,939.70
  6. Step 6: Final answer
    x = 390,299.12

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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.