Home / 1,390,709.36-1,919,020.20-778,777.04

Finding the Fourth Proportional to 1,390,709.36, 1,919,020.20 and 778,777.04

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Solution

The fourth proportional to 1,390,709.36, 1,919,020.20 and 778,777.04 is: 1,074,623.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,390,709.36 : 1,919,020.20 = 778,777.04 : x
  2. Step 2: Convert to fraction form
    1,390,709.36/1,919,020.20 = 778,777.04/x
  3. Step 3: Cross multiply
    1,390,709.36x = 1,919,020.20 × 778,777.04
  4. Step 4: Simplify right side
    1,390,709.36x = 1,494,488,871,056.21
  5. Step 5: Solve for x
    x = 1,494,488,871,056.21/1,390,709.36
  6. Step 6: Final answer
    x = 1,074,623.44

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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.