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Finding the Fourth Proportional to 615,661.40, 921,936.90 and 404,154.20

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Solution

The fourth proportional to 615,661.40, 921,936.90 and 404,154.20 is: 605,210.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,661.40 : 921,936.90 = 404,154.20 : x
  2. Step 2: Convert to fraction form
    615,661.40/921,936.90 = 404,154.20/x
  3. Step 3: Cross multiply
    615,661.40x = 921,936.90 × 404,154.20
  4. Step 4: Simplify right side
    615,661.40x = 372,604,670,269.98
  5. Step 5: Solve for x
    x = 372,604,670,269.98/615,661.40
  6. Step 6: Final answer
    x = 605,210.38

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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.