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Finding the Fourth Proportional to 618,400.90, 927,577.10 and 258,478.80

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Solution

The fourth proportional to 618,400.90, 927,577.10 and 258,478.80 is: 387,708.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,400.90 : 927,577.10 = 258,478.80 : x
  2. Step 2: Convert to fraction form
    618,400.90/927,577.10 = 258,478.80/x
  3. Step 3: Cross multiply
    618,400.90x = 927,577.10 × 258,478.80
  4. Step 4: Simplify right side
    618,400.90x = 239,759,015,715.48
  5. Step 5: Solve for x
    x = 239,759,015,715.48/618,400.90
  6. Step 6: Final answer
    x = 387,708.06

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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.