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Finding the Fourth Proportional to 291,616.02, 399,805.52 and 286,301.61

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Solution

The fourth proportional to 291,616.02, 399,805.52 and 286,301.61 is: 392,519.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,616.02 : 399,805.52 = 286,301.61 : x
  2. Step 2: Convert to fraction form
    291,616.02/399,805.52 = 286,301.61/x
  3. Step 3: Cross multiply
    291,616.02x = 399,805.52 × 286,301.61
  4. Step 4: Simplify right side
    291,616.02x = 114,464,962,631.38
  5. Step 5: Solve for x
    x = 114,464,962,631.38/291,616.02
  6. Step 6: Final answer
    x = 392,519.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.