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Finding the Fourth Proportional to 288,856.66, 398,487.86 and 186,915.06

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Solution

The fourth proportional to 288,856.66, 398,487.86 and 186,915.06 is: 257,855.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,856.66 : 398,487.86 = 186,915.06 : x
  2. Step 2: Convert to fraction form
    288,856.66/398,487.86 = 186,915.06/x
  3. Step 3: Cross multiply
    288,856.66x = 398,487.86 × 186,915.06
  4. Step 4: Simplify right side
    288,856.66x = 74,483,384,497.20
  5. Step 5: Solve for x
    x = 74,483,384,497.20/288,856.66
  6. Step 6: Final answer
    x = 257,855.87

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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.