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Finding the Fourth Proportional to 987,410.80, 1,480,957.80 and 355,999.60

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Solution

The fourth proportional to 987,410.80, 1,480,957.80 and 355,999.60 is: 533,942.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    987,410.80 : 1,480,957.80 = 355,999.60 : x
  2. Step 2: Convert to fraction form
    987,410.80/1,480,957.80 = 355,999.60/x
  3. Step 3: Cross multiply
    987,410.80x = 1,480,957.80 × 355,999.60
  4. Step 4: Simplify right side
    987,410.80x = 527,220,384,416.88
  5. Step 5: Solve for x
    x = 527,220,384,416.88/987,410.80
  6. Step 6: Final answer
    x = 533,942.29

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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.