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Finding the Fourth Proportional to 489,303.28, 675,239.74 and 285,494.32

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Solution

The fourth proportional to 489,303.28, 675,239.74 and 285,494.32 is: 393,982.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,303.28 : 675,239.74 = 285,494.32 : x
  2. Step 2: Convert to fraction form
    489,303.28/675,239.74 = 285,494.32/x
  3. Step 3: Cross multiply
    489,303.28x = 675,239.74 × 285,494.32
  4. Step 4: Simplify right side
    489,303.28x = 192,777,112,144.50
  5. Step 5: Solve for x
    x = 192,777,112,144.50/489,303.28
  6. Step 6: Final answer
    x = 393,982.87

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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.