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Finding the Fourth Proportional to 307,311.36, 424,051.20 and 171,312

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Solution

The fourth proportional to 307,311.36, 424,051.20 and 171,312 is: 236,389.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,311.36 : 424,051.20 = 171,312 : x
  2. Step 2: Convert to fraction form
    307,311.36/424,051.20 = 171,312/x
  3. Step 3: Cross multiply
    307,311.36x = 424,051.20 × 171,312
  4. Step 4: Simplify right side
    307,311.36x = 72,645,059,174.40
  5. Step 5: Solve for x
    x = 72,645,059,174.40/307,311.36
  6. Step 6: Final answer
    x = 236,389.11

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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.