Home / 1,287,130.80-1,928,130.12-1,005,328.56

Finding the Fourth Proportional to 1,287,130.80, 1,928,130.12 and 1,005,328.56

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Solution

The fourth proportional to 1,287,130.80, 1,928,130.12 and 1,005,328.56 is: 1,505,988.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,287,130.80 : 1,928,130.12 = 1,005,328.56 : x
  2. Step 2: Convert to fraction form
    1,287,130.80/1,928,130.12 = 1,005,328.56/x
  3. Step 3: Cross multiply
    1,287,130.80x = 1,928,130.12 × 1,005,328.56
  4. Step 4: Simplify right side
    1,287,130.80x = 1,938,404,277,032.23
  5. Step 5: Solve for x
    x = 1,938,404,277,032.23/1,287,130.80
  6. Step 6: Final answer
    x = 1,505,988.57

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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.