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Finding the Fourth Proportional to 489,112.60, 686,001.80 and 489,112.60

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Solution

The fourth proportional to 489,112.60, 686,001.80 and 489,112.60 is: 686,001.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,112.60 : 686,001.80 = 489,112.60 : x
  2. Step 2: Convert to fraction form
    489,112.60/686,001.80 = 489,112.60/x
  3. Step 3: Cross multiply
    489,112.60x = 686,001.80 × 489,112.60
  4. Step 4: Simplify right side
    489,112.60x = 335,532,124,002.68
  5. Step 5: Solve for x
    x = 335,532,124,002.68/489,112.60
  6. Step 6: Final answer
    x = 686,001.80

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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.