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Finding the Fourth Proportional to 867,997.80, 1,301,996.70 and 860,124.60

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Solution

The fourth proportional to 867,997.80, 1,301,996.70 and 860,124.60 is: 1,290,186.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    867,997.80 : 1,301,996.70 = 860,124.60 : x
  2. Step 2: Convert to fraction form
    867,997.80/1,301,996.70 = 860,124.60/x
  3. Step 3: Cross multiply
    867,997.80x = 1,301,996.70 × 860,124.60
  4. Step 4: Simplify right side
    867,997.80x = 1,119,879,390,788.82
  5. Step 5: Solve for x
    x = 1,119,879,390,788.82/867,997.80
  6. Step 6: Final answer
    x = 1,290,186.90

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1.5x scale

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.