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Finding the Fourth Proportional to 638,155.40, 957,233.10 and 402,542.60

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Solution

The fourth proportional to 638,155.40, 957,233.10 and 402,542.60 is: 603,813.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,155.40 : 957,233.10 = 402,542.60 : x
  2. Step 2: Convert to fraction form
    638,155.40/957,233.10 = 402,542.60/x
  3. Step 3: Cross multiply
    638,155.40x = 957,233.10 × 402,542.60
  4. Step 4: Simplify right side
    638,155.40x = 385,327,100,880.06
  5. Step 5: Solve for x
    x = 385,327,100,880.06/638,155.40
  6. Step 6: Final answer
    x = 603,813.90

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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.