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Finding the Fourth Proportional to 670,718.00, 925,831.60 and 398,785.25

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Solution

The fourth proportional to 670,718.00, 925,831.60 and 398,785.25 is: 550,466.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    670,718.00 : 925,831.60 = 398,785.25 : x
  2. Step 2: Convert to fraction form
    670,718.00/925,831.60 = 398,785.25/x
  3. Step 3: Cross multiply
    670,718.00x = 925,831.60 × 398,785.25
  4. Step 4: Simplify right side
    670,718.00x = 369,207,987,381.52
  5. Step 5: Solve for x
    x = 369,207,987,381.52/670,718.00
  6. Step 6: Final answer
    x = 550,466.79

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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.