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Finding the Fourth Proportional to 564,588.72, 779,129.28 and 306,470.88

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Solution

The fourth proportional to 564,588.72, 779,129.28 and 306,470.88 is: 422,928.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    564,588.72 : 779,129.28 = 306,470.88 : x
  2. Step 2: Convert to fraction form
    564,588.72/779,129.28 = 306,470.88/x
  3. Step 3: Cross multiply
    564,588.72x = 779,129.28 × 306,470.88
  4. Step 4: Simplify right side
    564,588.72x = 238,780,436,075.37
  5. Step 5: Solve for x
    x = 238,780,436,075.37/564,588.72
  6. Step 6: Final answer
    x = 422,928.10

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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.