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Finding the Fourth Proportional to 519,911.60, 778,312.20 and 489,153.20

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Solution

The fourth proportional to 519,911.60, 778,312.20 and 489,153.20 is: 732,266.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,911.60 : 778,312.20 = 489,153.20 : x
  2. Step 2: Convert to fraction form
    519,911.60/778,312.20 = 489,153.20/x
  3. Step 3: Cross multiply
    519,911.60x = 778,312.20 × 489,153.20
  4. Step 4: Simplify right side
    519,911.60x = 380,713,903,229.04
  5. Step 5: Solve for x
    x = 380,713,903,229.04/519,911.60
  6. Step 6: Final answer
    x = 732,266.61

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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.