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Finding the Fourth Proportional to 978,621.40, 1,467,579.93 and 338,751.28

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Solution

The fourth proportional to 978,621.40, 1,467,579.93 and 338,751.28 is: 508,005.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,621.40 : 1,467,579.93 = 338,751.28 : x
  2. Step 2: Convert to fraction form
    978,621.40/1,467,579.93 = 338,751.28/x
  3. Step 3: Cross multiply
    978,621.40x = 1,467,579.93 × 338,751.28
  4. Step 4: Simplify right side
    978,621.40x = 497,144,579,789.81
  5. Step 5: Solve for x
    x = 497,144,579,789.81/978,621.40
  6. Step 6: Final answer
    x = 508,005.02

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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.