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Finding the Fourth Proportional to 312,752.72, 431,638.72 and 174,939.30

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Solution

The fourth proportional to 312,752.72, 431,638.72 and 174,939.30 is: 241,438.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,752.72 : 431,638.72 = 174,939.30 : x
  2. Step 2: Convert to fraction form
    312,752.72/431,638.72 = 174,939.30/x
  3. Step 3: Cross multiply
    312,752.72x = 431,638.72 × 174,939.30
  4. Step 4: Simplify right side
    312,752.72x = 75,510,574,655.00
  5. Step 5: Solve for x
    x = 75,510,574,655.00/312,752.72
  6. Step 6: Final answer
    x = 241,438.59

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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.