Home / 738,346.78-1,018,919.01-398,815.03

Finding the Fourth Proportional to 738,346.78, 1,018,919.01 and 398,815.03

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Solution

The fourth proportional to 738,346.78, 1,018,919.01 and 398,815.03 is: 550,364.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    738,346.78 : 1,018,919.01 = 398,815.03 : x
  2. Step 2: Convert to fraction form
    738,346.78/1,018,919.01 = 398,815.03/x
  3. Step 3: Cross multiply
    738,346.78x = 1,018,919.01 × 398,815.03
  4. Step 4: Simplify right side
    738,346.78x = 406,360,215,540.72
  5. Step 5: Solve for x
    x = 406,360,215,540.72/738,346.78
  6. Step 6: Final answer
    x = 550,364.99

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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.