Home / 839,720.31-1,259,450.60-307,116.78

Finding the Fourth Proportional to 839,720.31, 1,259,450.60 and 307,116.78

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Solution

The fourth proportional to 839,720.31, 1,259,450.60 and 307,116.78 is: 460,627.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    839,720.31 : 1,259,450.60 = 307,116.78 : x
  2. Step 2: Convert to fraction form
    839,720.31/1,259,450.60 = 307,116.78/x
  3. Step 3: Cross multiply
    839,720.31x = 1,259,450.60 × 307,116.78
  4. Step 4: Simplify right side
    839,720.31x = 386,798,411,305.48
  5. Step 5: Solve for x
    x = 386,798,411,305.48/839,720.31
  6. Step 6: Final answer
    x = 460,627.67

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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.