Home / 1,390,020.28-1,918,203.53-769,812.59

Finding the Fourth Proportional to 1,390,020.28, 1,918,203.53 and 769,812.59

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Solution

The fourth proportional to 1,390,020.28, 1,918,203.53 and 769,812.59 is: 1,062,327.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,390,020.28 : 1,918,203.53 = 769,812.59 : x
  2. Step 2: Convert to fraction form
    1,390,020.28/1,918,203.53 = 769,812.59/x
  3. Step 3: Cross multiply
    1,390,020.28x = 1,918,203.53 × 769,812.59
  4. Step 4: Simplify right side
    1,390,020.28x = 1,476,657,228,522.89
  5. Step 5: Solve for x
    x = 1,476,657,228,522.89/1,390,020.28
  6. Step 6: Final answer
    x = 1,062,327.83

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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.