Home / 378,977.02-522,985.08-209,207.50

Finding the Fourth Proportional to 378,977.02, 522,985.08 and 209,207.50

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Solution

The fourth proportional to 378,977.02, 522,985.08 and 209,207.50 is: 288,704.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,977.02 : 522,985.08 = 209,207.50 : x
  2. Step 2: Convert to fraction form
    378,977.02/522,985.08 = 209,207.50/x
  3. Step 3: Cross multiply
    378,977.02x = 522,985.08 × 209,207.50
  4. Step 4: Simplify right side
    378,977.02x = 109,412,401,124.10
  5. Step 5: Solve for x
    x = 109,412,401,124.10/378,977.02
  6. Step 6: Final answer
    x = 288,704.58

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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.