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Finding the Fourth Proportional to 489,876.68, 734,861.50 and 190,380.40

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Solution

The fourth proportional to 489,876.68, 734,861.50 and 190,380.40 is: 285,588.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,876.68 : 734,861.50 = 190,380.40 : x
  2. Step 2: Convert to fraction form
    489,876.68/734,861.50 = 190,380.40/x
  3. Step 3: Cross multiply
    489,876.68x = 734,861.50 × 190,380.40
  4. Step 4: Simplify right side
    489,876.68x = 139,903,224,001.50
  5. Step 5: Solve for x
    x = 139,903,224,001.50/489,876.68
  6. Step 6: Final answer
    x = 285,588.66

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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.