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Finding the Fourth Proportional to 860,769,458.10, 1,289,240,999.55 and 860,769,458.10

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Solution

The fourth proportional to 860,769,458.10, 1,289,240,999.55 and 860,769,458.10 is: 1,289,240,999.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    860,769,458.10 : 1,289,240,999.55 = 860,769,458.10 : x
  2. Step 2: Convert to fraction form
    860,769,458.10/1,289,240,999.55 = 860,769,458.10/x
  3. Step 3: Cross multiply
    860,769,458.10x = 1,289,240,999.55 × 860,769,458.10
  4. Step 4: Simplify right side
    860,769,458.10x = 1,109,739,276,542,955,776
  5. Step 5: Solve for x
    x = 1,109,739,276,542,955,776/860,769,458.10
  6. Step 6: Final answer
    x = 1,289,240,999.55

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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.