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Finding the Fourth Proportional to 328,342.06, 492,703.00 and 138,790.16

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Solution

The fourth proportional to 328,342.06, 492,703.00 and 138,790.16 is: 208,265.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,342.06 : 492,703.00 = 138,790.16 : x
  2. Step 2: Convert to fraction form
    328,342.06/492,703.00 = 138,790.16/x
  3. Step 3: Cross multiply
    328,342.06x = 492,703.00 × 138,790.16
  4. Step 4: Simplify right side
    328,342.06x = 68,382,328,020.32
  5. Step 5: Solve for x
    x = 68,382,328,020.32/328,342.06
  6. Step 6: Final answer
    x = 208,265.52

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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.