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Finding the Fourth Proportional to 1,216,355.30, 1,821,908.55 and 1,006,403.30

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Solution

The fourth proportional to 1,216,355.30, 1,821,908.55 and 1,006,403.30 is: 1,507,433.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,216,355.30 : 1,821,908.55 = 1,006,403.30 : x
  2. Step 2: Convert to fraction form
    1,216,355.30/1,821,908.55 = 1,006,403.30/x
  3. Step 3: Cross multiply
    1,216,355.30x = 1,821,908.55 × 1,006,403.30
  4. Step 4: Simplify right side
    1,216,355.30x = 1,833,574,777,018.22
  5. Step 5: Solve for x
    x = 1,833,574,777,018.22/1,216,355.30
  6. Step 6: Final answer
    x = 1,507,433.54

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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.