Home / 1,215,082.40-1,819,999.20-653,460.80

Finding the Fourth Proportional to 1,215,082.40, 1,819,999.20 and 653,460.80

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Solution

The fourth proportional to 1,215,082.40, 1,819,999.20 and 653,460.80 is: 978,779.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,215,082.40 : 1,819,999.20 = 653,460.80 : x
  2. Step 2: Convert to fraction form
    1,215,082.40/1,819,999.20 = 653,460.80/x
  3. Step 3: Cross multiply
    1,215,082.40x = 1,819,999.20 × 653,460.80
  4. Step 4: Simplify right side
    1,215,082.40x = 1,189,298,133,231.36
  5. Step 5: Solve for x
    x = 1,189,298,133,231.36/1,215,082.40
  6. Step 6: Final answer
    x = 978,779.82

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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.