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Finding the Fourth Proportional to 665,527.36, 918,590.94 and 379,216.12

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Solution

The fourth proportional to 665,527.36, 918,590.94 and 379,216.12 is: 523,411.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,527.36 : 918,590.94 = 379,216.12 : x
  2. Step 2: Convert to fraction form
    665,527.36/918,590.94 = 379,216.12/x
  3. Step 3: Cross multiply
    665,527.36x = 918,590.94 × 379,216.12
  4. Step 4: Simplify right side
    665,527.36x = 348,344,492,133.95
  5. Step 5: Solve for x
    x = 348,344,492,133.95/665,527.36
  6. Step 6: Final answer
    x = 523,411.23

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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.