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Finding the Fourth Proportional to 612,323.10, 918,375.30 and 387,280.80

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Solution

The fourth proportional to 612,323.10, 918,375.30 and 387,280.80 is: 580,852.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,323.10 : 918,375.30 = 387,280.80 : x
  2. Step 2: Convert to fraction form
    612,323.10/918,375.30 = 387,280.80/x
  3. Step 3: Cross multiply
    612,323.10x = 918,375.30 × 387,280.80
  4. Step 4: Simplify right side
    612,323.10x = 355,669,120,884.24
  5. Step 5: Solve for x
    x = 355,669,120,884.24/612,323.10
  6. Step 6: Final answer
    x = 580,852.04

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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.