Home / 1,215,102.40-1,820,029.20-653,480.80

Finding the Fourth Proportional to 1,215,102.40, 1,820,029.20 and 653,480.80

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Solution

The fourth proportional to 1,215,102.40, 1,820,029.20 and 653,480.80 is: 978,809.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,215,102.40 : 1,820,029.20 = 653,480.80 : x
  2. Step 2: Convert to fraction form
    1,215,102.40/1,820,029.20 = 653,480.80/x
  3. Step 3: Cross multiply
    1,215,102.40x = 1,820,029.20 × 653,480.80
  4. Step 4: Simplify right side
    1,215,102.40x = 1,189,354,137,639.36
  5. Step 5: Solve for x
    x = 1,189,354,137,639.36/1,215,102.40
  6. Step 6: Final answer
    x = 978,809.80

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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.