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Finding the Fourth Proportional to 561,840.38, 775,339.72 and 307,191.56

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Solution

The fourth proportional to 561,840.38, 775,339.72 and 307,191.56 is: 423,924.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,840.38 : 775,339.72 = 307,191.56 : x
  2. Step 2: Convert to fraction form
    561,840.38/775,339.72 = 307,191.56/x
  3. Step 3: Cross multiply
    561,840.38x = 775,339.72 × 307,191.56
  4. Step 4: Simplify right side
    561,840.38x = 238,177,820,877.99
  5. Step 5: Solve for x
    x = 238,177,820,877.99/561,840.38
  6. Step 6: Final answer
    x = 423,924.36

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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.