Home / 256,949.63-354,356.20-220,639.66

Finding the Fourth Proportional to 256,949.63, 354,356.20 and 220,639.66

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Solution

The fourth proportional to 256,949.63, 354,356.20 and 220,639.66 is: 304,281.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,949.63 : 354,356.20 = 220,639.66 : x
  2. Step 2: Convert to fraction form
    256,949.63/354,356.20 = 220,639.66/x
  3. Step 3: Cross multiply
    256,949.63x = 354,356.20 × 220,639.66
  4. Step 4: Simplify right side
    256,949.63x = 78,185,031,486.89
  5. Step 5: Solve for x
    x = 78,185,031,486.89/256,949.63
  6. Step 6: Final answer
    x = 304,281.55

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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.