Home / 738,640.26-1,019,321.96-399,108.51

Finding the Fourth Proportional to 738,640.26, 1,019,321.96 and 399,108.51

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Solution

The fourth proportional to 738,640.26, 1,019,321.96 and 399,108.51 is: 550,768.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    738,640.26 : 1,019,321.96 = 399,108.51 : x
  2. Step 2: Convert to fraction form
    738,640.26/1,019,321.96 = 399,108.51/x
  3. Step 3: Cross multiply
    738,640.26x = 1,019,321.96 × 399,108.51
  4. Step 4: Simplify right side
    738,640.26x = 406,820,066,670.34
  5. Step 5: Solve for x
    x = 406,820,066,670.34/738,640.26
  6. Step 6: Final answer
    x = 550,768.88

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1.5x scale

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.