Home / 738,412.22-1,019,009.78-398,880.47

Finding the Fourth Proportional to 738,412.22, 1,019,009.78 and 398,880.47

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Solution

The fourth proportional to 738,412.22, 1,019,009.78 and 398,880.47 is: 550,455.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    738,412.22 : 1,019,009.78 = 398,880.47 : x
  2. Step 2: Convert to fraction form
    738,412.22/1,019,009.78 = 398,880.47/x
  3. Step 3: Cross multiply
    738,412.22x = 1,019,009.78 × 398,880.47
  4. Step 4: Simplify right side
    738,412.22x = 406,463,100,534.12
  5. Step 5: Solve for x
    x = 406,463,100,534.12/738,412.22
  6. Step 6: Final answer
    x = 550,455.54

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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.