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Finding the Fourth Proportional to 528,162, 728,863.56 and 289,692.88

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Solution

The fourth proportional to 528,162, 728,863.56 and 289,692.88 is: 399,776.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,162 : 728,863.56 = 289,692.88 : x
  2. Step 2: Convert to fraction form
    528,162/728,863.56 = 289,692.88/x
  3. Step 3: Cross multiply
    528,162x = 728,863.56 × 289,692.88
  4. Step 4: Simplify right side
    528,162x = 211,146,583,823.45
  5. Step 5: Solve for x
    x = 211,146,583,823.45/528,162
  6. Step 6: Final answer
    x = 399,776.17

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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.