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Finding the Fourth Proportional to 670,643.96, 925,020.20 and 455,410.35

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Solution

The fourth proportional to 670,643.96, 925,020.20 and 455,410.35 is: 628,148.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    670,643.96 : 925,020.20 = 455,410.35 : x
  2. Step 2: Convert to fraction form
    670,643.96/925,020.20 = 455,410.35/x
  3. Step 3: Cross multiply
    670,643.96x = 925,020.20 × 455,410.35
  4. Step 4: Simplify right side
    670,643.96x = 421,263,774,177.60
  5. Step 5: Solve for x
    x = 421,263,774,177.60/670,643.96
  6. Step 6: Final answer
    x = 628,148.17

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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.