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Finding the Fourth Proportional to 255,511.82, 352,603.45 and 145,129.67

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Solution

The fourth proportional to 255,511.82, 352,603.45 and 145,129.67 is: 200,277.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,511.82 : 352,603.45 = 145,129.67 : x
  2. Step 2: Convert to fraction form
    255,511.82/352,603.45 = 145,129.67/x
  3. Step 3: Cross multiply
    255,511.82x = 352,603.45 × 145,129.67
  4. Step 4: Simplify right side
    255,511.82x = 51,173,222,339.36
  5. Step 5: Solve for x
    x = 51,173,222,339.36/255,511.82
  6. Step 6: Final answer
    x = 200,277.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.