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Finding the Fourth Proportional to 984,647.10, 1,476,970.65 and 978,426.30

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Solution

The fourth proportional to 984,647.10, 1,476,970.65 and 978,426.30 is: 1,467,639.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    984,647.10 : 1,476,970.65 = 978,426.30 : x
  2. Step 2: Convert to fraction form
    984,647.10/1,476,970.65 = 978,426.30/x
  3. Step 3: Cross multiply
    984,647.10x = 1,476,970.65 × 978,426.30
  4. Step 4: Simplify right side
    984,647.10x = 1,445,106,928,288.10
  5. Step 5: Solve for x
    x = 1,445,106,928,288.10/984,647.10
  6. Step 6: Final answer
    x = 1,467,639.45

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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.