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Finding the Fourth Proportional to 312,672.60, 469,008.90 and 135,055.80

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Solution

The fourth proportional to 312,672.60, 469,008.90 and 135,055.80 is: 202,583.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,672.60 : 469,008.90 = 135,055.80 : x
  2. Step 2: Convert to fraction form
    312,672.60/469,008.90 = 135,055.80/x
  3. Step 3: Cross multiply
    312,672.60x = 469,008.90 × 135,055.80
  4. Step 4: Simplify right side
    312,672.60x = 63,342,372,196.62
  5. Step 5: Solve for x
    x = 63,342,372,196.62/312,672.60
  6. Step 6: Final answer
    x = 202,583.70

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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.