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Finding the Fourth Proportional to 691,798.78, 1,036,722.74 and 326,670.80

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Solution

The fourth proportional to 691,798.78, 1,036,722.74 and 326,670.80 is: 489,545.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    691,798.78 : 1,036,722.74 = 326,670.80 : x
  2. Step 2: Convert to fraction form
    691,798.78/1,036,722.74 = 326,670.80/x
  3. Step 3: Cross multiply
    691,798.78x = 1,036,722.74 × 326,670.80
  4. Step 4: Simplify right side
    691,798.78x = 338,667,047,706.11
  5. Step 5: Solve for x
    x = 338,667,047,706.11/691,798.78
  6. Step 6: Final answer
    x = 489,545.60

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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.