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Finding the Fourth Proportional to 311,391.81, 429,722.01 and 175,427.39

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Solution

The fourth proportional to 311,391.81, 429,722.01 and 175,427.39 is: 242,090.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,391.81 : 429,722.01 = 175,427.39 : x
  2. Step 2: Convert to fraction form
    311,391.81/429,722.01 = 175,427.39/x
  3. Step 3: Cross multiply
    311,391.81x = 429,722.01 × 175,427.39
  4. Step 4: Simplify right side
    311,391.81x = 75,385,009,296.97
  5. Step 5: Solve for x
    x = 75,385,009,296.97/311,391.81
  6. Step 6: Final answer
    x = 242,090.53

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.