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Finding the Fourth Proportional to 621,703.12, 858,304.20 and 410,349.52

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Solution

The fourth proportional to 621,703.12, 858,304.20 and 410,349.52 is: 566,515.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,703.12 : 858,304.20 = 410,349.52 : x
  2. Step 2: Convert to fraction form
    621,703.12/858,304.20 = 410,349.52/x
  3. Step 3: Cross multiply
    621,703.12x = 858,304.20 × 410,349.52
  4. Step 4: Simplify right side
    621,703.12x = 352,204,716,483.98
  5. Step 5: Solve for x
    x = 352,204,716,483.98/621,703.12
  6. Step 6: Final answer
    x = 566,515.92

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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.