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Finding the Fourth Proportional to 673,215.72, 929,077.74 and 386,728.44

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Solution

The fourth proportional to 673,215.72, 929,077.74 and 386,728.44 is: 533,708.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    673,215.72 : 929,077.74 = 386,728.44 : x
  2. Step 2: Convert to fraction form
    673,215.72/929,077.74 = 386,728.44/x
  3. Step 3: Cross multiply
    673,215.72x = 929,077.74 × 386,728.44
  4. Step 4: Simplify right side
    673,215.72x = 359,300,785,028.93
  5. Step 5: Solve for x
    x = 359,300,785,028.93/673,215.72
  6. Step 6: Final answer
    x = 533,708.25

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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.