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Finding the Fourth Proportional to 313,406.64, 432,508.68 and 170,172.72

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Solution

The fourth proportional to 313,406.64, 432,508.68 and 170,172.72 is: 234,842.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    313,406.64 : 432,508.68 = 170,172.72 : x
  2. Step 2: Convert to fraction form
    313,406.64/432,508.68 = 170,172.72/x
  3. Step 3: Cross multiply
    313,406.64x = 432,508.68 × 170,172.72
  4. Step 4: Simplify right side
    313,406.64x = 73,601,178,499.21
  5. Step 5: Solve for x
    x = 73,601,178,499.21/313,406.64
  6. Step 6: Final answer
    x = 234,842.44

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.