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Finding the Fourth Proportional to 1,038,945.30, 1,555,793.55 and 828,993.30

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Solution

The fourth proportional to 1,038,945.30, 1,555,793.55 and 828,993.30 is: 1,241,395.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,038,945.30 : 1,555,793.55 = 828,993.30 : x
  2. Step 2: Convert to fraction form
    1,038,945.30/1,555,793.55 = 828,993.30/x
  3. Step 3: Cross multiply
    1,038,945.30x = 1,555,793.55 × 828,993.30
  4. Step 4: Simplify right side
    1,038,945.30x = 1,289,742,429,133.22
  5. Step 5: Solve for x
    x = 1,289,742,429,133.22/1,038,945.30
  6. Step 6: Final answer
    x = 1,241,395.89

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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.