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Finding the Fourth Proportional to 978,131.60, 1,467,456.60 and 346,979.60

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Solution

The fourth proportional to 978,131.60, 1,467,456.60 and 346,979.60 is: 520,561.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,131.60 : 1,467,456.60 = 346,979.60 : x
  2. Step 2: Convert to fraction form
    978,131.60/1,467,456.60 = 346,979.60/x
  3. Step 3: Cross multiply
    978,131.60x = 1,467,456.60 × 346,979.60
  4. Step 4: Simplify right side
    978,131.60x = 509,177,504,085.36
  5. Step 5: Solve for x
    x = 509,177,504,085.36/978,131.60
  6. Step 6: Final answer
    x = 520,561.35

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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.