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Finding the Fourth Proportional to 714,237.90, 985,660.40 and 391,977.98

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Solution

The fourth proportional to 714,237.90, 985,660.40 and 391,977.98 is: 540,936.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,237.90 : 985,660.40 = 391,977.98 : x
  2. Step 2: Convert to fraction form
    714,237.90/985,660.40 = 391,977.98/x
  3. Step 3: Cross multiply
    714,237.90x = 985,660.40 × 391,977.98
  4. Step 4: Simplify right side
    714,237.90x = 386,357,175,645.33
  5. Step 5: Solve for x
    x = 386,357,175,645.33/714,237.90
  6. Step 6: Final answer
    x = 540,936.25

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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.