Home / 432,031.45-647,990.26-128,419.12

Finding the Fourth Proportional to 432,031.45, 647,990.26 and 128,419.12

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Solution

The fourth proportional to 432,031.45, 647,990.26 and 128,419.12 is: 192,611.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    432,031.45 : 647,990.26 = 128,419.12 : x
  2. Step 2: Convert to fraction form
    432,031.45/647,990.26 = 128,419.12/x
  3. Step 3: Cross multiply
    432,031.45x = 647,990.26 × 128,419.12
  4. Step 4: Simplify right side
    432,031.45x = 83,214,338,957.77
  5. Step 5: Solve for x
    x = 83,214,338,957.77/432,031.45
  6. Step 6: Final answer
    x = 192,611.76

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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.