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Finding the Fourth Proportional to 842,916.60, 1,264,374.90 and 828,919.80

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Solution

The fourth proportional to 842,916.60, 1,264,374.90 and 828,919.80 is: 1,243,379.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    842,916.60 : 1,264,374.90 = 828,919.80 : x
  2. Step 2: Convert to fraction form
    842,916.60/1,264,374.90 = 828,919.80/x
  3. Step 3: Cross multiply
    842,916.60x = 1,264,374.90 × 828,919.80
  4. Step 4: Simplify right side
    842,916.60x = 1,048,065,389,233.02
  5. Step 5: Solve for x
    x = 1,048,065,389,233.02/842,916.60
  6. Step 6: Final answer
    x = 1,243,379.70

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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.