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Finding the Fourth Proportional to 216,429.30, 324,643.95 and 156,986.10

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Solution

The fourth proportional to 216,429.30, 324,643.95 and 156,986.10 is: 235,479.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,429.30 : 324,643.95 = 156,986.10 : x
  2. Step 2: Convert to fraction form
    216,429.30/324,643.95 = 156,986.10/x
  3. Step 3: Cross multiply
    216,429.30x = 324,643.95 × 156,986.10
  4. Step 4: Simplify right side
    216,429.30x = 50,964,587,599.10
  5. Step 5: Solve for x
    x = 50,964,587,599.10/216,429.30
  6. Step 6: Final answer
    x = 235,479.15

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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.