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Finding the Fourth Proportional to 324,139.90, 485,590.20 and 174,330.40

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Solution

The fourth proportional to 324,139.90, 485,590.20 and 174,330.40 is: 261,162.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    324,139.90 : 485,590.20 = 174,330.40 : x
  2. Step 2: Convert to fraction form
    324,139.90/485,590.20 = 174,330.40/x
  3. Step 3: Cross multiply
    324,139.90x = 485,590.20 × 174,330.40
  4. Step 4: Simplify right side
    324,139.90x = 84,653,133,802.08
  5. Step 5: Solve for x
    x = 84,653,133,802.08/324,139.90
  6. Step 6: Final answer
    x = 261,162.34

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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.