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Finding the Fourth Proportional to 519,903.60, 778,300.20 and 489,145.20

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Solution

The fourth proportional to 519,903.60, 778,300.20 and 489,145.20 is: 732,254.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,903.60 : 778,300.20 = 489,145.20 : x
  2. Step 2: Convert to fraction form
    519,903.60/778,300.20 = 489,145.20/x
  3. Step 3: Cross multiply
    519,903.60x = 778,300.20 × 489,145.20
  4. Step 4: Simplify right side
    519,903.60x = 380,701,806,989.04
  5. Step 5: Solve for x
    x = 380,701,806,989.04/519,903.60
  6. Step 6: Final answer
    x = 732,254.61

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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.