Home / 438,128.20-655,734.30-317,843.20

Finding the Fourth Proportional to 438,128.20, 655,734.30 and 317,843.20

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Solution

The fourth proportional to 438,128.20, 655,734.30 and 317,843.20 is: 475,707.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,128.20 : 655,734.30 = 317,843.20 : x
  2. Step 2: Convert to fraction form
    438,128.20/655,734.30 = 317,843.20/x
  3. Step 3: Cross multiply
    438,128.20x = 655,734.30 × 317,843.20
  4. Step 4: Simplify right side
    438,128.20x = 208,420,688,261.76
  5. Step 5: Solve for x
    x = 208,420,688,261.76/438,128.20
  6. Step 6: Final answer
    x = 475,707.08

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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.