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Finding the Fourth Proportional to 520,079.10, 778,563.45 and 489,320.70

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Solution

The fourth proportional to 520,079.10, 778,563.45 and 489,320.70 is: 732,517.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,079.10 : 778,563.45 = 489,320.70 : x
  2. Step 2: Convert to fraction form
    520,079.10/778,563.45 = 489,320.70/x
  3. Step 3: Cross multiply
    520,079.10x = 778,563.45 × 489,320.70
  4. Step 4: Simplify right side
    520,079.10x = 380,967,212,348.42
  5. Step 5: Solve for x
    x = 380,967,212,348.42/520,079.10
  6. Step 6: Final answer
    x = 732,517.83

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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.