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Finding the Fourth Proportional to 398,831.60, 550,389.33 and 217,547.43

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Solution

The fourth proportional to 398,831.60, 550,389.33 and 217,547.43 is: 300,216.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,831.60 : 550,389.33 = 217,547.43 : x
  2. Step 2: Convert to fraction form
    398,831.60/550,389.33 = 217,547.43/x
  3. Step 3: Cross multiply
    398,831.60x = 550,389.33 × 217,547.43
  4. Step 4: Simplify right side
    398,831.60x = 119,735,784,240.92
  5. Step 5: Solve for x
    x = 119,735,784,240.92/398,831.60
  6. Step 6: Final answer
    x = 300,216.40

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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.