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Finding the Fourth Proportional to 620,991.44, 931,493.08 and 340,355.60

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Solution

The fourth proportional to 620,991.44, 931,493.08 and 340,355.60 is: 510,536.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,991.44 : 931,493.08 = 340,355.60 : x
  2. Step 2: Convert to fraction form
    620,991.44/931,493.08 = 340,355.60/x
  3. Step 3: Cross multiply
    620,991.44x = 931,493.08 × 340,355.60
  4. Step 4: Simplify right side
    620,991.44x = 317,038,886,139.25
  5. Step 5: Solve for x
    x = 317,038,886,139.25/620,991.44
  6. Step 6: Final answer
    x = 510,536.64

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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.