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Finding the Fourth Proportional to 561,801.56, 775,286.16 and 307,152.75

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Solution

The fourth proportional to 561,801.56, 775,286.16 and 307,152.75 is: 423,870.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,801.56 : 775,286.16 = 307,152.75 : x
  2. Step 2: Convert to fraction form
    561,801.56/775,286.16 = 307,152.75/x
  3. Step 3: Cross multiply
    561,801.56x = 775,286.16 × 307,152.75
  4. Step 4: Simplify right side
    561,801.56x = 238,131,276,080.94
  5. Step 5: Solve for x
    x = 238,131,276,080.94/561,801.56
  6. Step 6: Final answer
    x = 423,870.80

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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.