Home / 1,392,307.61-1,921,502.03-780,450.62

Finding the Fourth Proportional to 1,392,307.61, 1,921,502.03 and 780,450.62

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Solution

The fourth proportional to 1,392,307.61, 1,921,502.03 and 780,450.62 is: 1,077,087.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,392,307.61 : 1,921,502.03 = 780,450.62 : x
  2. Step 2: Convert to fraction form
    1,392,307.61/1,921,502.03 = 780,450.62/x
  3. Step 3: Cross multiply
    1,392,307.61x = 1,921,502.03 × 780,450.62
  4. Step 4: Simplify right side
    1,392,307.61x = 1,499,637,446,742.51
  5. Step 5: Solve for x
    x = 1,499,637,446,742.51/1,392,307.61
  6. Step 6: Final answer
    x = 1,077,087.73

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.