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Finding the Fourth Proportional to 978,708.80, 1,467,717.60 and 347,643.20

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Solution

The fourth proportional to 978,708.80, 1,467,717.60 and 347,643.20 is: 521,342.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,708.80 : 1,467,717.60 = 347,643.20 : x
  2. Step 2: Convert to fraction form
    978,708.80/1,467,717.60 = 347,643.20/x
  3. Step 3: Cross multiply
    978,708.80x = 1,467,717.60 × 347,643.20
  4. Step 4: Simplify right side
    978,708.80x = 510,242,043,160.32
  5. Step 5: Solve for x
    x = 510,242,043,160.32/978,708.80
  6. Step 6: Final answer
    x = 521,342.04

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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.