Home / 645,966.54-891,427.32-359,481.78

Finding the Fourth Proportional to 645,966.54, 891,427.32 and 359,481.78

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Solution

The fourth proportional to 645,966.54, 891,427.32 and 359,481.78 is: 496,081.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,966.54 : 891,427.32 = 359,481.78 : x
  2. Step 2: Convert to fraction form
    645,966.54/891,427.32 = 359,481.78/x
  3. Step 3: Cross multiply
    645,966.54x = 891,427.32 × 359,481.78
  4. Step 4: Simplify right side
    645,966.54x = 320,451,879,734.23
  5. Step 5: Solve for x
    x = 320,451,879,734.23/645,966.54
  6. Step 6: Final answer
    x = 496,081.24

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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.