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Finding the Fourth Proportional to 268,653.60, 402,980.40 and 256,843.80

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Solution

The fourth proportional to 268,653.60, 402,980.40 and 256,843.80 is: 385,265.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,653.60 : 402,980.40 = 256,843.80 : x
  2. Step 2: Convert to fraction form
    268,653.60/402,980.40 = 256,843.80/x
  3. Step 3: Cross multiply
    268,653.60x = 402,980.40 × 256,843.80
  4. Step 4: Simplify right side
    268,653.60x = 103,503,017,261.52
  5. Step 5: Solve for x
    x = 103,503,017,261.52/268,653.60
  6. Step 6: Final answer
    x = 385,265.70

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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.