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Finding the Fourth Proportional to 489,351.80, 734,027.70 and 438,030.20

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Solution

The fourth proportional to 489,351.80, 734,027.70 and 438,030.20 is: 657,045.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,351.80 : 734,027.70 = 438,030.20 : x
  2. Step 2: Convert to fraction form
    489,351.80/734,027.70 = 438,030.20/x
  3. Step 3: Cross multiply
    489,351.80x = 734,027.70 × 438,030.20
  4. Step 4: Simplify right side
    489,351.80x = 321,526,300,236.54
  5. Step 5: Solve for x
    x = 321,526,300,236.54/489,351.80
  6. Step 6: Final answer
    x = 657,045.30

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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.