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Finding the Fourth Proportional to 489,139.20, 733,708.80 and 400,492.80

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Solution

The fourth proportional to 489,139.20, 733,708.80 and 400,492.80 is: 600,739.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,139.20 : 733,708.80 = 400,492.80 : x
  2. Step 2: Convert to fraction form
    489,139.20/733,708.80 = 400,492.80/x
  3. Step 3: Cross multiply
    489,139.20x = 733,708.80 × 400,492.80
  4. Step 4: Simplify right side
    489,139.20x = 293,845,091,696.64
  5. Step 5: Solve for x
    x = 293,845,091,696.64/489,139.20
  6. Step 6: Final answer
    x = 600,739.20

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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.