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Finding the Fourth Proportional to 620,966.91, 856,433.12 and 416,956.35

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Solution

The fourth proportional to 620,966.91, 856,433.12 and 416,956.35 is: 575,063.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,966.91 : 856,433.12 = 416,956.35 : x
  2. Step 2: Convert to fraction form
    620,966.91/856,433.12 = 416,956.35/x
  3. Step 3: Cross multiply
    620,966.91x = 856,433.12 × 416,956.35
  4. Step 4: Simplify right side
    620,966.91x = 357,095,225,649.53
  5. Step 5: Solve for x
    x = 357,095,225,649.53/620,966.91
  6. Step 6: Final answer
    x = 575,063.21

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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.