Home / 389,280.80-583,921.20-345,735.20

Finding the Fourth Proportional to 389,280.80, 583,921.20 and 345,735.20

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Solution

The fourth proportional to 389,280.80, 583,921.20 and 345,735.20 is: 518,602.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,280.80 : 583,921.20 = 345,735.20 : x
  2. Step 2: Convert to fraction form
    389,280.80/583,921.20 = 345,735.20/x
  3. Step 3: Cross multiply
    389,280.80x = 583,921.20 × 345,735.20
  4. Step 4: Simplify right side
    389,280.80x = 201,882,112,866.24
  5. Step 5: Solve for x
    x = 201,882,112,866.24/389,280.80
  6. Step 6: Final answer
    x = 518,602.80

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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.