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Finding the Fourth Proportional to 324,002.40, 485,830.80 and 136,802.40

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Solution

The fourth proportional to 324,002.40, 485,830.80 and 136,802.40 is: 205,130.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    324,002.40 : 485,830.80 = 136,802.40 : x
  2. Step 2: Convert to fraction form
    324,002.40/485,830.80 = 136,802.40/x
  3. Step 3: Cross multiply
    324,002.40x = 485,830.80 × 136,802.40
  4. Step 4: Simplify right side
    324,002.40x = 66,462,819,433.92
  5. Step 5: Solve for x
    x = 66,462,819,433.92/324,002.40
  6. Step 6: Final answer
    x = 205,130.64

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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.