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Finding the Fourth Proportional to 978,702.80, 1,467,708.60 and 347,637.20

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Solution

The fourth proportional to 978,702.80, 1,467,708.60 and 347,637.20 is: 521,333.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,702.80 : 1,467,708.60 = 347,637.20 : x
  2. Step 2: Convert to fraction form
    978,702.80/1,467,708.60 = 347,637.20/x
  3. Step 3: Cross multiply
    978,702.80x = 1,467,708.60 × 347,637.20
  4. Step 4: Simplify right side
    978,702.80x = 510,230,108,119.92
  5. Step 5: Solve for x
    x = 510,230,108,119.92/978,702.80
  6. Step 6: Final answer
    x = 521,333.04

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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.