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Finding the Fourth Proportional to 320,634.99, 480,574.62 and 130,978.35

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Solution

The fourth proportional to 320,634.99, 480,574.62 and 130,978.35 is: 196,313.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,634.99 : 480,574.62 = 130,978.35 : x
  2. Step 2: Convert to fraction form
    320,634.99/480,574.62 = 130,978.35/x
  3. Step 3: Cross multiply
    320,634.99x = 480,574.62 × 130,978.35
  4. Step 4: Simplify right side
    320,634.99x = 62,944,870,779.48
  5. Step 5: Solve for x
    x = 62,944,870,779.48/320,634.99
  6. Step 6: Final answer
    x = 196,313.17

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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.