Home / 1,239,076.80-1,858,615.20-672,206.40

Finding the Fourth Proportional to 1,239,076.80, 1,858,615.20 and 672,206.40

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Solution

The fourth proportional to 1,239,076.80, 1,858,615.20 and 672,206.40 is: 1,008,309.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,239,076.80 : 1,858,615.20 = 672,206.40 : x
  2. Step 2: Convert to fraction form
    1,239,076.80/1,858,615.20 = 672,206.40/x
  3. Step 3: Cross multiply
    1,239,076.80x = 1,858,615.20 × 672,206.40
  4. Step 4: Simplify right side
    1,239,076.80x = 1,249,373,032,577.28
  5. Step 5: Solve for x
    x = 1,249,373,032,577.28/1,239,076.80
  6. Step 6: Final answer
    x = 1,008,309.60

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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.