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Finding the Fourth Proportional to 867,992.80, 1,301,989.20 and 860,119.60

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Solution

The fourth proportional to 867,992.80, 1,301,989.20 and 860,119.60 is: 1,290,179.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    867,992.80 : 1,301,989.20 = 860,119.60 : x
  2. Step 2: Convert to fraction form
    867,992.80/1,301,989.20 = 860,119.60/x
  3. Step 3: Cross multiply
    867,992.80x = 1,301,989.20 × 860,119.60
  4. Step 4: Simplify right side
    867,992.80x = 1,119,866,429,908.32
  5. Step 5: Solve for x
    x = 1,119,866,429,908.32/867,992.80
  6. Step 6: Final answer
    x = 1,290,179.40

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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.