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Finding the Fourth Proportional to 978,721.84, 1,467,090.84 and 663,210.64

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Solution

The fourth proportional to 978,721.84, 1,467,090.84 and 663,210.64 is: 994,143.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,721.84 : 1,467,090.84 = 663,210.64 : x
  2. Step 2: Convert to fraction form
    978,721.84/1,467,090.84 = 663,210.64/x
  3. Step 3: Cross multiply
    978,721.84x = 1,467,090.84 × 663,210.64
  4. Step 4: Simplify right side
    978,721.84x = 972,990,254,934.54
  5. Step 5: Solve for x
    x = 972,990,254,934.54/978,721.84
  6. Step 6: Final answer
    x = 994,143.81

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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.