Home / 1,122,139.47-1,548,554.23-638,704.64

Finding the Fourth Proportional to 1,122,139.47, 1,548,554.23 and 638,704.64

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Solution

The fourth proportional to 1,122,139.47, 1,548,554.23 and 638,704.64 is: 881,413.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,122,139.47 : 1,548,554.23 = 638,704.64 : x
  2. Step 2: Convert to fraction form
    1,122,139.47/1,548,554.23 = 638,704.64/x
  3. Step 3: Cross multiply
    1,122,139.47x = 1,548,554.23 × 638,704.64
  4. Step 4: Simplify right side
    1,122,139.47x = 989,068,771,992.63
  5. Step 5: Solve for x
    x = 989,068,771,992.63/1,122,139.47
  6. Step 6: Final answer
    x = 881,413.41

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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.