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Finding the Fourth Proportional to 255,478.38, 382,979.30 and 86,883.50

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Solution

The fourth proportional to 255,478.38, 382,979.30 and 86,883.50 is: 130,244.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,478.38 : 382,979.30 = 86,883.50 : x
  2. Step 2: Convert to fraction form
    255,478.38/382,979.30 = 86,883.50/x
  3. Step 3: Cross multiply
    255,478.38x = 382,979.30 × 86,883.50
  4. Step 4: Simplify right side
    255,478.38x = 33,274,579,662.24
  5. Step 5: Solve for x
    x = 33,274,579,662.24/255,478.38
  6. Step 6: Final answer
    x = 130,244.21

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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.