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Finding the Fourth Proportional to 1,048,541.60, 1,570,479.60 and 861,917.60

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Solution

The fourth proportional to 1,048,541.60, 1,570,479.60 and 861,917.60 is: 1,290,958.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,048,541.60 : 1,570,479.60 = 861,917.60 : x
  2. Step 2: Convert to fraction form
    1,048,541.60/1,570,479.60 = 861,917.60/x
  3. Step 3: Cross multiply
    1,048,541.60x = 1,570,479.60 × 861,917.60
  4. Step 4: Simplify right side
    1,048,541.60x = 1,353,624,007,680.96
  5. Step 5: Solve for x
    x = 1,353,624,007,680.96/1,048,541.60
  6. Step 6: Final answer
    x = 1,290,958.80

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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.