Home / 312,575.49-431,312.87-197,651.36

Finding the Fourth Proportional to 312,575.49, 431,312.87 and 197,651.36

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Solution

The fourth proportional to 312,575.49, 431,312.87 and 197,651.36 is: 272,732.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,575.49 : 431,312.87 = 197,651.36 : x
  2. Step 2: Convert to fraction form
    312,575.49/431,312.87 = 197,651.36/x
  3. Step 3: Cross multiply
    312,575.49x = 431,312.87 × 197,651.36
  4. Step 4: Simplify right side
    312,575.49x = 85,249,576,913.41
  5. Step 5: Solve for x
    x = 85,249,576,913.41/312,575.49
  6. Step 6: Final answer
    x = 272,732.76

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1.5x scale

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.