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Finding the Fourth Proportional to 379,427.60, 569,173.80 and 130,109.60

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Solution

The fourth proportional to 379,427.60, 569,173.80 and 130,109.60 is: 195,175.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    379,427.60 : 569,173.80 = 130,109.60 : x
  2. Step 2: Convert to fraction form
    379,427.60/569,173.80 = 130,109.60/x
  3. Step 3: Cross multiply
    379,427.60x = 569,173.80 × 130,109.60
  4. Step 4: Simplify right side
    379,427.60x = 74,054,975,448.48
  5. Step 5: Solve for x
    x = 74,054,975,448.48/379,427.60
  6. Step 6: Final answer
    x = 195,175.51

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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.