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Finding the Fourth Proportional to 620,744.60, 931,110 and 437,621.55

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Solution

The fourth proportional to 620,744.60, 931,110 and 437,621.55 is: 656,427.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,744.60 : 931,110 = 437,621.55 : x
  2. Step 2: Convert to fraction form
    620,744.60/931,110 = 437,621.55/x
  3. Step 3: Cross multiply
    620,744.60x = 931,110 × 437,621.55
  4. Step 4: Simplify right side
    620,744.60x = 407,473,801,420.50
  5. Step 5: Solve for x
    x = 407,473,801,420.50/620,744.60
  6. Step 6: Final answer
    x = 656,427.47

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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.