Home / 378,976.02-522,983.70-209,206.50

Finding the Fourth Proportional to 378,976.02, 522,983.70 and 209,206.50

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Solution

The fourth proportional to 378,976.02, 522,983.70 and 209,206.50 is: 288,703.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,976.02 : 522,983.70 = 209,206.50 : x
  2. Step 2: Convert to fraction form
    378,976.02/522,983.70 = 209,206.50/x
  3. Step 3: Cross multiply
    378,976.02x = 522,983.70 × 209,206.50
  4. Step 4: Simplify right side
    378,976.02x = 109,411,589,434.05
  5. Step 5: Solve for x
    x = 109,411,589,434.05/378,976.02
  6. Step 6: Final answer
    x = 288,703.20

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.