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Finding the Fourth Proportional to 621,095.53, 857,113.25 and 349,165.66

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Solution

The fourth proportional to 621,095.53, 857,113.25 and 349,165.66 is: 481,849.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,095.53 : 857,113.25 = 349,165.66 : x
  2. Step 2: Convert to fraction form
    621,095.53/857,113.25 = 349,165.66/x
  3. Step 3: Cross multiply
    621,095.53x = 857,113.25 × 349,165.66
  4. Step 4: Simplify right side
    621,095.53x = 299,274,509,742.38
  5. Step 5: Solve for x
    x = 299,274,509,742.38/621,095.53
  6. Step 6: Final answer
    x = 481,849.40

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Double scale
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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.