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Finding the Fourth Proportional to 871,975.40, 1,307,963.10 and 822,986.60

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Solution

The fourth proportional to 871,975.40, 1,307,963.10 and 822,986.60 is: 1,234,479.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    871,975.40 : 1,307,963.10 = 822,986.60 : x
  2. Step 2: Convert to fraction form
    871,975.40/1,307,963.10 = 822,986.60/x
  3. Step 3: Cross multiply
    871,975.40x = 1,307,963.10 × 822,986.60
  4. Step 4: Simplify right side
    871,975.40x = 1,076,436,104,594.46
  5. Step 5: Solve for x
    x = 1,076,436,104,594.46/871,975.40
  6. Step 6: Final answer
    x = 1,234,479.90

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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.