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Finding the Fourth Proportional to 620,645.20, 931,428.60 and 246,936.40

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Solution

The fourth proportional to 620,645.20, 931,428.60 and 246,936.40 is: 370,587.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,645.20 : 931,428.60 = 246,936.40 : x
  2. Step 2: Convert to fraction form
    620,645.20/931,428.60 = 246,936.40/x
  3. Step 3: Cross multiply
    620,645.20x = 931,428.60 × 246,936.40
  4. Step 4: Simplify right side
    620,645.20x = 230,003,625,341.04
  5. Step 5: Solve for x
    x = 230,003,625,341.04/620,645.20
  6. Step 6: Final answer
    x = 370,587.94

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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.