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Finding the Fourth Proportional to 660,580.72, 991,026.19 and 205,148.70

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Solution

The fourth proportional to 660,580.72, 991,026.19 and 205,148.70 is: 307,771.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,580.72 : 991,026.19 = 205,148.70 : x
  2. Step 2: Convert to fraction form
    660,580.72/991,026.19 = 205,148.70/x
  3. Step 3: Cross multiply
    660,580.72x = 991,026.19 × 205,148.70
  4. Step 4: Simplify right side
    660,580.72x = 203,307,734,800.89
  5. Step 5: Solve for x
    x = 203,307,734,800.89/660,580.72
  6. Step 6: Final answer
    x = 307,771.22

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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.