Home / 1,287,540.80-1,931,570.40-445,918.40

Finding the Fourth Proportional to 1,287,540.80, 1,931,570.40 and 445,918.40

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Solution

The fourth proportional to 1,287,540.80, 1,931,570.40 and 445,918.40 is: 668,967.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,287,540.80 : 1,931,570.40 = 445,918.40 : x
  2. Step 2: Convert to fraction form
    1,287,540.80/1,931,570.40 = 445,918.40/x
  3. Step 3: Cross multiply
    1,287,540.80x = 1,931,570.40 × 445,918.40
  4. Step 4: Simplify right side
    1,287,540.80x = 861,322,782,255.36
  5. Step 5: Solve for x
    x = 861,322,782,255.36/1,287,540.80
  6. Step 6: Final answer
    x = 668,967.37

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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.