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Finding the Fourth Proportional to 528,406.72, 729,201.28 and 302,057.28

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Solution

The fourth proportional to 528,406.72, 729,201.28 and 302,057.28 is: 416,839.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,406.72 : 729,201.28 = 302,057.28 : x
  2. Step 2: Convert to fraction form
    528,406.72/729,201.28 = 302,057.28/x
  3. Step 3: Cross multiply
    528,406.72x = 729,201.28 × 302,057.28
  4. Step 4: Simplify right side
    528,406.72x = 220,260,555,209.32
  5. Step 5: Solve for x
    x = 220,260,555,209.32/528,406.72
  6. Step 6: Final answer
    x = 416,839.05

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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.