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Finding the Fourth Proportional to 489,881.68, 734,869 and 190,385.40

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Solution

The fourth proportional to 489,881.68, 734,869 and 190,385.40 is: 285,596.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,881.68 : 734,869 = 190,385.40 : x
  2. Step 2: Convert to fraction form
    489,881.68/734,869 = 190,385.40/x
  3. Step 3: Cross multiply
    489,881.68x = 734,869 × 190,385.40
  4. Step 4: Simplify right side
    489,881.68x = 139,908,328,512.60
  5. Step 5: Solve for x
    x = 139,908,328,512.60/489,881.68
  6. Step 6: Final answer
    x = 285,596.16

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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.