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Finding the Fourth Proportional to 665,424.87, 998,220.15 and 260,564.82

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Solution

The fourth proportional to 665,424.87, 998,220.15 and 260,564.82 is: 390,879.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,424.87 : 998,220.15 = 260,564.82 : x
  2. Step 2: Convert to fraction form
    665,424.87/998,220.15 = 260,564.82/x
  3. Step 3: Cross multiply
    665,424.87x = 998,220.15 × 260,564.82
  4. Step 4: Simplify right side
    665,424.87x = 260,101,053,705.12
  5. Step 5: Solve for x
    x = 260,101,053,705.12/665,424.87
  6. Step 6: Final answer
    x = 390,879.67

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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.