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Finding the Fourth Proportional to 313,679.45, 432,876.79 and 170,440.00

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Solution

The fourth proportional to 313,679.45, 432,876.79 and 170,440.00 is: 235,206.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    313,679.45 : 432,876.79 = 170,440.00 : x
  2. Step 2: Convert to fraction form
    313,679.45/432,876.79 = 170,440.00/x
  3. Step 3: Cross multiply
    313,679.45x = 432,876.79 × 170,440.00
  4. Step 4: Simplify right side
    313,679.45x = 73,779,519,218.46
  5. Step 5: Solve for x
    x = 73,779,519,218.46/313,679.45
  6. Step 6: Final answer
    x = 235,206.73

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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.