Home / 525,918.28-725,818.20-311,127.40

Finding the Fourth Proportional to 525,918.28, 725,818.20 and 311,127.40

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Solution

The fourth proportional to 525,918.28, 725,818.20 and 311,127.40 is: 429,385.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    525,918.28 : 725,818.20 = 311,127.40 : x
  2. Step 2: Convert to fraction form
    525,918.28/725,818.20 = 311,127.40/x
  3. Step 3: Cross multiply
    525,918.28x = 725,818.20 × 311,127.40
  4. Step 4: Simplify right side
    525,918.28x = 225,821,929,438.68
  5. Step 5: Solve for x
    x = 225,821,929,438.68/525,918.28
  6. Step 6: Final answer
    x = 429,385.97

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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.