Home / 1,418,939.60-2,128,403.80-421,667.60

Finding the Fourth Proportional to 1,418,939.60, 2,128,403.80 and 421,667.60

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Solution

The fourth proportional to 1,418,939.60, 2,128,403.80 and 421,667.60 is: 632,499.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,418,939.60 : 2,128,403.80 = 421,667.60 : x
  2. Step 2: Convert to fraction form
    1,418,939.60/2,128,403.80 = 421,667.60/x
  3. Step 3: Cross multiply
    1,418,939.60x = 2,128,403.80 × 421,667.60
  4. Step 4: Simplify right side
    1,418,939.60x = 897,478,922,176.88
  5. Step 5: Solve for x
    x = 897,478,922,176.88/1,418,939.60
  6. Step 6: Final answer
    x = 632,499.74

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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.