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Finding the Fourth Proportional to 407,575.80, 611,363.70 and 257,328.90

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Solution

The fourth proportional to 407,575.80, 611,363.70 and 257,328.90 is: 385,993.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    407,575.80 : 611,363.70 = 257,328.90 : x
  2. Step 2: Convert to fraction form
    407,575.80/611,363.70 = 257,328.90/x
  3. Step 3: Cross multiply
    407,575.80x = 611,363.70 × 257,328.90
  4. Step 4: Simplify right side
    407,575.80x = 157,321,548,420.93
  5. Step 5: Solve for x
    x = 157,321,548,420.93/407,575.80
  6. Step 6: Final answer
    x = 385,993.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.