Home / 1,390,448.40-2,085,147.68-641,969.52

Finding the Fourth Proportional to 1,390,448.40, 2,085,147.68 and 641,969.52

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Solution

The fourth proportional to 1,390,448.40, 2,085,147.68 and 641,969.52 is: 962,711.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,390,448.40 : 2,085,147.68 = 641,969.52 : x
  2. Step 2: Convert to fraction form
    1,390,448.40/2,085,147.68 = 641,969.52/x
  3. Step 3: Cross multiply
    1,390,448.40x = 2,085,147.68 × 641,969.52
  4. Step 4: Simplify right side
    1,390,448.40x = 1,338,601,255,258.71
  5. Step 5: Solve for x
    x = 1,338,601,255,258.71/1,390,448.40
  6. Step 6: Final answer
    x = 962,711.92

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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.