Home / 429,255.60-644,401.80-426,145.20

Finding the Fourth Proportional to 429,255.60, 644,401.80 and 426,145.20

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Solution

The fourth proportional to 429,255.60, 644,401.80 and 426,145.20 is: 639,732.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,255.60 : 644,401.80 = 426,145.20 : x
  2. Step 2: Convert to fraction form
    429,255.60/644,401.80 = 426,145.20/x
  3. Step 3: Cross multiply
    429,255.60x = 644,401.80 × 426,145.20
  4. Step 4: Simplify right side
    429,255.60x = 274,608,733,941.36
  5. Step 5: Solve for x
    x = 274,608,733,941.36/429,255.60
  6. Step 6: Final answer
    x = 639,732.44

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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.