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Finding the Fourth Proportional to 489,980.43, 734,684.55 and 190,110.78

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Solution

The fourth proportional to 489,980.43, 734,684.55 and 190,110.78 is: 285,055.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,980.43 : 734,684.55 = 190,110.78 : x
  2. Step 2: Convert to fraction form
    489,980.43/734,684.55 = 190,110.78/x
  3. Step 3: Cross multiply
    489,980.43x = 734,684.55 × 190,110.78
  4. Step 4: Simplify right side
    489,980.43x = 139,671,455,642.00
  5. Step 5: Solve for x
    x = 139,671,455,642.00/489,980.43
  6. Step 6: Final answer
    x = 285,055.17

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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.