Home / 1,390,559.13-2,085,313.68-642,080.25

Finding the Fourth Proportional to 1,390,559.13, 2,085,313.68 and 642,080.25

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Solution

The fourth proportional to 1,390,559.13, 2,085,313.68 and 642,080.25 is: 962,877.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,390,559.13 : 2,085,313.68 = 642,080.25 : x
  2. Step 2: Convert to fraction form
    1,390,559.13/2,085,313.68 = 642,080.25/x
  3. Step 3: Cross multiply
    1,390,559.13x = 2,085,313.68 × 642,080.25
  4. Step 4: Simplify right side
    1,390,559.13x = 1,338,938,728,982.82
  5. Step 5: Solve for x
    x = 1,338,938,728,982.82/1,390,559.13
  6. Step 6: Final answer
    x = 962,877.95

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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.