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Finding the Fourth Proportional to 489,878.56, 734,981.46 and 190,368.91

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Solution

The fourth proportional to 489,878.56, 734,981.46 and 190,368.91 is: 285,616.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,878.56 : 734,981.46 = 190,368.91 : x
  2. Step 2: Convert to fraction form
    489,878.56/734,981.46 = 190,368.91/x
  3. Step 3: Cross multiply
    489,878.56x = 734,981.46 × 190,368.91
  4. Step 4: Simplify right side
    489,878.56x = 139,917,619,410.41
  5. Step 5: Solve for x
    x = 139,917,619,410.41/489,878.56
  6. Step 6: Final answer
    x = 285,616.95

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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.