Home / 738,345.78-1,018,917.63-398,814.03

Finding the Fourth Proportional to 738,345.78, 1,018,917.63 and 398,814.03

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Solution

The fourth proportional to 738,345.78, 1,018,917.63 and 398,814.03 is: 550,363.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    738,345.78 : 1,018,917.63 = 398,814.03 : x
  2. Step 2: Convert to fraction form
    738,345.78/1,018,917.63 = 398,814.03/x
  3. Step 3: Cross multiply
    738,345.78x = 1,018,917.63 × 398,814.03
  4. Step 4: Simplify right side
    738,345.78x = 406,358,646,258.35
  5. Step 5: Solve for x
    x = 406,358,646,258.35/738,345.78
  6. Step 6: Final answer
    x = 550,363.61

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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.