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Finding the Fourth Proportional to 489,038.20, 734,723.70 and 437,716.60

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Solution

The fourth proportional to 489,038.20, 734,723.70 and 437,716.60 is: 657,618.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,038.20 : 734,723.70 = 437,716.60 : x
  2. Step 2: Convert to fraction form
    489,038.20/734,723.70 = 437,716.60/x
  3. Step 3: Cross multiply
    489,038.20x = 734,723.70 × 437,716.60
  4. Step 4: Simplify right side
    489,038.20x = 321,600,759,903.42
  5. Step 5: Solve for x
    x = 321,600,759,903.42/489,038.20
  6. Step 6: Final answer
    x = 657,618.89

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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.