Home / 1,221,346.80-1,831,145.40-511,009.20

Finding the Fourth Proportional to 1,221,346.80, 1,831,145.40 and 511,009.20

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Solution

The fourth proportional to 1,221,346.80, 1,831,145.40 and 511,009.20 is: 766,147.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,221,346.80 : 1,831,145.40 = 511,009.20 : x
  2. Step 2: Convert to fraction form
    1,221,346.80/1,831,145.40 = 511,009.20/x
  3. Step 3: Cross multiply
    1,221,346.80x = 1,831,145.40 × 511,009.20
  4. Step 4: Simplify right side
    1,221,346.80x = 935,732,145,937.68
  5. Step 5: Solve for x
    x = 935,732,145,937.68/1,221,346.80
  6. Step 6: Final answer
    x = 766,147.79

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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.