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Finding the Fourth Proportional to 561,203.81, 774,432.38 and 306,505.79

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Solution

The fourth proportional to 561,203.81, 774,432.38 and 306,505.79 is: 422,962.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,203.81 : 774,432.38 = 306,505.79 : x
  2. Step 2: Convert to fraction form
    561,203.81/774,432.38 = 306,505.79/x
  3. Step 3: Cross multiply
    561,203.81x = 774,432.38 × 306,505.79
  4. Step 4: Simplify right side
    561,203.81x = 237,368,003,028.79
  5. Step 5: Solve for x
    x = 237,368,003,028.79/561,203.81
  6. Step 6: Final answer
    x = 422,962.21

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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.