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Finding the Fourth Proportional to 288,831.39, 398,453.10 and 186,889.71

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Solution

The fourth proportional to 288,831.39, 398,453.10 and 186,889.71 is: 257,820.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,831.39 : 398,453.10 = 186,889.71 : x
  2. Step 2: Convert to fraction form
    288,831.39/398,453.10 = 186,889.71/x
  3. Step 3: Cross multiply
    288,831.39x = 398,453.10 × 186,889.71
  4. Step 4: Simplify right side
    288,831.39x = 74,466,782,264.64
  5. Step 5: Solve for x
    x = 74,466,782,264.64/288,831.39
  6. Step 6: Final answer
    x = 257,820.94

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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.