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Finding the Fourth Proportional to 291,492.75, 402,434.96 and 191,065.71

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Solution

The fourth proportional to 291,492.75, 402,434.96 and 191,065.71 is: 263,785.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,492.75 : 402,434.96 = 191,065.71 : x
  2. Step 2: Convert to fraction form
    291,492.75/402,434.96 = 191,065.71/x
  3. Step 3: Cross multiply
    291,492.75x = 402,434.96 × 191,065.71
  4. Step 4: Simplify right side
    291,492.75x = 76,891,520,405.89
  5. Step 5: Solve for x
    x = 76,891,520,405.89/291,492.75
  6. Step 6: Final answer
    x = 263,785.36

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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.