Home / 257,823.72-386,888.64-139,492.44

Finding the Fourth Proportional to 257,823.72, 386,888.64 and 139,492.44

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Solution

The fourth proportional to 257,823.72, 386,888.64 and 139,492.44 is: 209,321.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,823.72 : 386,888.64 = 139,492.44 : x
  2. Step 2: Convert to fraction form
    257,823.72/386,888.64 = 139,492.44/x
  3. Step 3: Cross multiply
    257,823.72x = 386,888.64 × 139,492.44
  4. Step 4: Simplify right side
    257,823.72x = 53,968,040,401.88
  5. Step 5: Solve for x
    x = 53,968,040,401.88/257,823.72
  6. Step 6: Final answer
    x = 209,321.47

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1.5x scale

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.