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Finding the Fourth Proportional to 891,544.50, 1,230,353.01 and 489,136.50

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Solution

The fourth proportional to 891,544.50, 1,230,353.01 and 489,136.50 is: 675,020.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    891,544.50 : 1,230,353.01 = 489,136.50 : x
  2. Step 2: Convert to fraction form
    891,544.50/1,230,353.01 = 489,136.50/x
  3. Step 3: Cross multiply
    891,544.50x = 1,230,353.01 × 489,136.50
  4. Step 4: Simplify right side
    891,544.50x = 601,810,565,075.87
  5. Step 5: Solve for x
    x = 601,810,565,075.87/891,544.50
  6. Step 6: Final answer
    x = 675,020.22

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.