Home / 1,320,088.40-1,821,409.72-747,128.56

Finding the Fourth Proportional to 1,320,088.40, 1,821,409.72 and 747,128.56

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Solution

The fourth proportional to 1,320,088.40, 1,821,409.72 and 747,128.56 is: 1,030,860.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,320,088.40 : 1,821,409.72 = 747,128.56 : x
  2. Step 2: Convert to fraction form
    1,320,088.40/1,821,409.72 = 747,128.56/x
  3. Step 3: Cross multiply
    1,320,088.40x = 1,821,409.72 × 747,128.56
  4. Step 4: Simplify right side
    1,320,088.40x = 1,360,827,221,273.60
  5. Step 5: Solve for x
    x = 1,360,827,221,273.60/1,320,088.40
  6. Step 6: Final answer
    x = 1,030,860.68

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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.