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Finding the Fourth Proportional to 307,015.64, 423,394.21 and 242,638.67

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Solution

The fourth proportional to 307,015.64, 423,394.21 and 242,638.67 is: 334,614.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,015.64 : 423,394.21 = 242,638.67 : x
  2. Step 2: Convert to fraction form
    307,015.64/423,394.21 = 242,638.67/x
  3. Step 3: Cross multiply
    307,015.64x = 423,394.21 × 242,638.67
  4. Step 4: Simplify right side
    307,015.64x = 102,731,809,361.89
  5. Step 5: Solve for x
    x = 102,731,809,361.89/307,015.64
  6. Step 6: Final answer
    x = 334,614.26

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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.