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Finding the Fourth Proportional to 660,662.15, 990,779.99 and 187,220.39

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Solution

The fourth proportional to 660,662.15, 990,779.99 and 187,220.39 is: 280,770.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,662.15 : 990,779.99 = 187,220.39 : x
  2. Step 2: Convert to fraction form
    660,662.15/990,779.99 = 187,220.39/x
  3. Step 3: Cross multiply
    660,662.15x = 990,779.99 × 187,220.39
  4. Step 4: Simplify right side
    660,662.15x = 185,494,210,241.99
  5. Step 5: Solve for x
    x = 185,494,210,241.99/660,662.15
  6. Step 6: Final answer
    x = 280,770.15

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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.