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Finding the Fourth Proportional to 673,185.28, 928,995.64 and 371,379.28

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Solution

The fourth proportional to 673,185.28, 928,995.64 and 371,379.28 is: 512,503.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    673,185.28 : 928,995.64 = 371,379.28 : x
  2. Step 2: Convert to fraction form
    673,185.28/928,995.64 = 371,379.28/x
  3. Step 3: Cross multiply
    673,185.28x = 928,995.64 × 371,379.28
  4. Step 4: Simplify right side
    673,185.28x = 345,009,731,906.34
  5. Step 5: Solve for x
    x = 345,009,731,906.34/673,185.28
  6. Step 6: Final answer
    x = 512,503.38

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Half scale
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Double scale
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Similar ratio
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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.