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Finding the Fourth Proportional to 668,334.16, 921,892.60 and 396,219.76

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Solution

The fourth proportional to 668,334.16, 921,892.60 and 396,219.76 is: 546,541.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,334.16 : 921,892.60 = 396,219.76 : x
  2. Step 2: Convert to fraction form
    668,334.16/921,892.60 = 396,219.76/x
  3. Step 3: Cross multiply
    668,334.16x = 921,892.60 × 396,219.76
  4. Step 4: Simplify right side
    668,334.16x = 365,272,064,717.78
  5. Step 5: Solve for x
    x = 365,272,064,717.78/668,334.16
  6. Step 6: Final answer
    x = 546,541.07

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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.