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Finding the Fourth Proportional to 621,758.10, 858,026.13 and 353,486.10

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Solution

The fourth proportional to 621,758.10, 858,026.13 and 353,486.10 is: 487,810.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,758.10 : 858,026.13 = 353,486.10 : x
  2. Step 2: Convert to fraction form
    621,758.10/858,026.13 = 353,486.10/x
  3. Step 3: Cross multiply
    621,758.10x = 858,026.13 × 353,486.10
  4. Step 4: Simplify right side
    621,758.10x = 303,300,310,391.79
  5. Step 5: Solve for x
    x = 303,300,310,391.79/621,758.10
  6. Step 6: Final answer
    x = 487,810.79

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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.