Home / 1,218,378-1,681,128.36-788,598.48

Finding the Fourth Proportional to 1,218,378, 1,681,128.36 and 788,598.48

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Solution

The fourth proportional to 1,218,378, 1,681,128.36 and 788,598.48 is: 1,088,114.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,218,378 : 1,681,128.36 = 788,598.48 : x
  2. Step 2: Convert to fraction form
    1,218,378/1,681,128.36 = 788,598.48/x
  3. Step 3: Cross multiply
    1,218,378x = 1,681,128.36 × 788,598.48
  4. Step 4: Simplify right side
    1,218,378x = 1,325,735,269,380.89
  5. Step 5: Solve for x
    x = 1,325,735,269,380.89/1,218,378
  6. Step 6: Final answer
    x = 1,088,114.91

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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.