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Finding the Fourth Proportional to 256,522.40, 384,783.60 and 130,113.80

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Solution

The fourth proportional to 256,522.40, 384,783.60 and 130,113.80 is: 195,170.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,522.40 : 384,783.60 = 130,113.80 : x
  2. Step 2: Convert to fraction form
    256,522.40/384,783.60 = 130,113.80/x
  3. Step 3: Cross multiply
    256,522.40x = 384,783.60 × 130,113.80
  4. Step 4: Simplify right side
    256,522.40x = 50,065,656,373.68
  5. Step 5: Solve for x
    x = 50,065,656,373.68/256,522.40
  6. Step 6: Final answer
    x = 195,170.70

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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.