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Finding the Fourth Proportional to 489,868.83, 675,900.68 and 285,803.28

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Solution

The fourth proportional to 489,868.83, 675,900.68 and 285,803.28 is: 394,339.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,868.83 : 675,900.68 = 285,803.28 : x
  2. Step 2: Convert to fraction form
    489,868.83/675,900.68 = 285,803.28/x
  3. Step 3: Cross multiply
    489,868.83x = 675,900.68 × 285,803.28
  4. Step 4: Simplify right side
    489,868.83x = 193,174,629,869.21
  5. Step 5: Solve for x
    x = 193,174,629,869.21/489,868.83
  6. Step 6: Final answer
    x = 394,339.50

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1.5x scale

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.