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Finding the Fourth Proportional to 338,638.65, 507,985.64 and 170,072.28

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Solution

The fourth proportional to 338,638.65, 507,985.64 and 170,072.28 is: 255,122.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    338,638.65 : 507,985.64 = 170,072.28 : x
  2. Step 2: Convert to fraction form
    338,638.65/507,985.64 = 170,072.28/x
  3. Step 3: Cross multiply
    338,638.65x = 507,985.64 × 170,072.28
  4. Step 4: Simplify right side
    338,638.65x = 86,394,276,002.06
  5. Step 5: Solve for x
    x = 86,394,276,002.06/338,638.65
  6. Step 6: Final answer
    x = 255,122.31

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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.