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Finding the Fourth Proportional to 326,658, 490,113.76 and 127,118.54

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Solution

The fourth proportional to 326,658, 490,113.76 and 127,118.54 is: 190,727.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,658 : 490,113.76 = 127,118.54 : x
  2. Step 2: Convert to fraction form
    326,658/490,113.76 = 127,118.54/x
  3. Step 3: Cross multiply
    326,658x = 490,113.76 × 127,118.54
  4. Step 4: Simplify right side
    326,658x = 62,302,545,605.11
  5. Step 5: Solve for x
    x = 62,302,545,605.11/326,658
  6. Step 6: Final answer
    x = 190,727.14

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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.