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Finding the Fourth Proportional to 6,978,851.52, 9,629,390.28 and 4,077,681.84

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Solution

The fourth proportional to 6,978,851.52, 9,629,390.28 and 4,077,681.84 is: 5,626,368.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,978,851.52 : 9,629,390.28 = 4,077,681.84 : x
  2. Step 2: Convert to fraction form
    6,978,851.52/9,629,390.28 = 4,077,681.84/x
  3. Step 3: Cross multiply
    6,978,851.52x = 9,629,390.28 × 4,077,681.84
  4. Step 4: Simplify right side
    6,978,851.52x = 39,265,589,875,028.51
  5. Step 5: Solve for x
    x = 39,265,589,875,028.51/6,978,851.52
  6. Step 6: Final answer
    x = 5,626,368.43

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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.