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Finding the Fourth Proportional to 216,937.20, 325,405.80 and 172,322.40

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Solution

The fourth proportional to 216,937.20, 325,405.80 and 172,322.40 is: 258,483.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,937.20 : 325,405.80 = 172,322.40 : x
  2. Step 2: Convert to fraction form
    216,937.20/325,405.80 = 172,322.40/x
  3. Step 3: Cross multiply
    216,937.20x = 325,405.80 × 172,322.40
  4. Step 4: Simplify right side
    216,937.20x = 56,074,708,429.92
  5. Step 5: Solve for x
    x = 56,074,708,429.92/216,937.20
  6. Step 6: Final answer
    x = 258,483.60

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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.