Home / 780,988-1,170,144.64-426,250.96

Finding the Fourth Proportional to 780,988, 1,170,144.64 and 426,250.96

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Solution

The fourth proportional to 780,988, 1,170,144.64 and 426,250.96 is: 638,646.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    780,988 : 1,170,144.64 = 426,250.96 : x
  2. Step 2: Convert to fraction form
    780,988/1,170,144.64 = 426,250.96/x
  3. Step 3: Cross multiply
    780,988x = 1,170,144.64 × 426,250.96
  4. Step 4: Simplify right side
    780,988x = 498,775,276,138.85
  5. Step 5: Solve for x
    x = 498,775,276,138.85/780,988
  6. Step 6: Final answer
    x = 638,646.53

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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.