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Finding the Fourth Proportional to 306,333.90, 459,440.10 and 291,143.70

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Solution

The fourth proportional to 306,333.90, 459,440.10 and 291,143.70 is: 436,657.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,333.90 : 459,440.10 = 291,143.70 : x
  2. Step 2: Convert to fraction form
    306,333.90/459,440.10 = 291,143.70/x
  3. Step 3: Cross multiply
    306,333.90x = 459,440.10 × 291,143.70
  4. Step 4: Simplify right side
    306,333.90x = 133,763,090,642.37
  5. Step 5: Solve for x
    x = 133,763,090,642.37/306,333.90
  6. Step 6: Final answer
    x = 436,657.81

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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.