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Finding the Fourth Proportional to 978,368.80, 1,467,115.80 and 379,130.80

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Solution

The fourth proportional to 978,368.80, 1,467,115.80 and 379,130.80 is: 568,526.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,368.80 : 1,467,115.80 = 379,130.80 : x
  2. Step 2: Convert to fraction form
    978,368.80/1,467,115.80 = 379,130.80/x
  3. Step 3: Cross multiply
    978,368.80x = 1,467,115.80 × 379,130.80
  4. Step 4: Simplify right side
    978,368.80x = 556,228,786,946.64
  5. Step 5: Solve for x
    x = 556,228,786,946.64/978,368.80
  6. Step 6: Final answer
    x = 568,526.70

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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.