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Finding the Fourth Proportional to 449,089.32, 618,690.51 and 312,876.87

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Solution

The fourth proportional to 449,089.32, 618,690.51 and 312,876.87 is: 431,036.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    449,089.32 : 618,690.51 = 312,876.87 : x
  2. Step 2: Convert to fraction form
    449,089.32/618,690.51 = 312,876.87/x
  3. Step 3: Cross multiply
    449,089.32x = 618,690.51 × 312,876.87
  4. Step 4: Simplify right side
    449,089.32x = 193,573,950,267.50
  5. Step 5: Solve for x
    x = 193,573,950,267.50/449,089.32
  6. Step 6: Final answer
    x = 431,036.64

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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.