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Finding the Fourth Proportional to 673,794.75, 929,731.05 and 387,261.30

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Solution

The fourth proportional to 673,794.75, 929,731.05 and 387,261.30 is: 534,359.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    673,794.75 : 929,731.05 = 387,261.30 : x
  2. Step 2: Convert to fraction form
    673,794.75/929,731.05 = 387,261.30/x
  3. Step 3: Cross multiply
    673,794.75x = 929,731.05 × 387,261.30
  4. Step 4: Simplify right side
    673,794.75x = 360,048,855,073.37
  5. Step 5: Solve for x
    x = 360,048,855,073.37/673,794.75
  6. Step 6: Final answer
    x = 534,359.84

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Double scale
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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.