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Finding the Fourth Proportional to 814,404.60, 1,219,638.60 and 778,975.20

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Solution

The fourth proportional to 814,404.60, 1,219,638.60 and 778,975.20 is: 1,166,580.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    814,404.60 : 1,219,638.60 = 778,975.20 : x
  2. Step 2: Convert to fraction form
    814,404.60/1,219,638.60 = 778,975.20/x
  3. Step 3: Cross multiply
    814,404.60x = 1,219,638.60 × 778,975.20
  4. Step 4: Simplify right side
    814,404.60x = 950,068,222,362.72
  5. Step 5: Solve for x
    x = 950,068,222,362.72/814,404.60
  6. Step 6: Final answer
    x = 1,166,580.13

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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.