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Finding the Fourth Proportional to 978,048.40, 1,467,072.60 and 918,999.40

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Solution

The fourth proportional to 978,048.40, 1,467,072.60 and 918,999.40 is: 1,378,499.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,048.40 : 1,467,072.60 = 918,999.40 : x
  2. Step 2: Convert to fraction form
    978,048.40/1,467,072.60 = 918,999.40/x
  3. Step 3: Cross multiply
    978,048.40x = 1,467,072.60 × 918,999.40
  4. Step 4: Simplify right side
    978,048.40x = 1,348,238,839,156.44
  5. Step 5: Solve for x
    x = 1,348,238,839,156.44/978,048.40
  6. Step 6: Final answer
    x = 1,378,499.10

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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.