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Finding the Fourth Proportional to 489,172.95, 685,775.25 and 489,172.95

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Solution

The fourth proportional to 489,172.95, 685,775.25 and 489,172.95 is: 685,775.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,172.95 : 685,775.25 = 489,172.95 : x
  2. Step 2: Convert to fraction form
    489,172.95/685,775.25 = 489,172.95/x
  3. Step 3: Cross multiply
    489,172.95x = 685,775.25 × 489,172.95
  4. Step 4: Simplify right side
    489,172.95x = 335,462,702,079.49
  5. Step 5: Solve for x
    x = 335,462,702,079.49/489,172.95
  6. Step 6: Final answer
    x = 685,775.25

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.