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Finding the Fourth Proportional to 561,223.38, 774,459.38 and 306,525.36

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Solution

The fourth proportional to 561,223.38, 774,459.38 and 306,525.36 is: 422,989.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,223.38 : 774,459.38 = 306,525.36 : x
  2. Step 2: Convert to fraction form
    561,223.38/774,459.38 = 306,525.36/x
  3. Step 3: Cross multiply
    561,223.38x = 774,459.38 × 306,525.36
  4. Step 4: Simplify right side
    561,223.38x = 237,391,440,259.88
  5. Step 5: Solve for x
    x = 237,391,440,259.88/561,223.38
  6. Step 6: Final answer
    x = 422,989.22

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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.