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Finding the Fourth Proportional to 489,133.90, 674,718.80 and 307,558.36

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Solution

The fourth proportional to 489,133.90, 674,718.80 and 307,558.36 is: 424,250.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,133.90 : 674,718.80 = 307,558.36 : x
  2. Step 2: Convert to fraction form
    489,133.90/674,718.80 = 307,558.36/x
  3. Step 3: Cross multiply
    489,133.90x = 674,718.80 × 307,558.36
  4. Step 4: Simplify right side
    489,133.90x = 207,515,407,589.17
  5. Step 5: Solve for x
    x = 207,515,407,589.17/489,133.90
  6. Step 6: Final answer
    x = 424,250.72

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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.