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Finding the Fourth Proportional to 528,634.28, 729,496.77 and 286,912.01

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Solution

The fourth proportional to 528,634.28, 729,496.77 and 286,912.01 is: 395,928.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,634.28 : 729,496.77 = 286,912.01 : x
  2. Step 2: Convert to fraction form
    528,634.28/729,496.77 = 286,912.01/x
  3. Step 3: Cross multiply
    528,634.28x = 729,496.77 × 286,912.01
  4. Step 4: Simplify right side
    528,634.28x = 209,301,384,569.21
  5. Step 5: Solve for x
    x = 209,301,384,569.21/528,634.28
  6. Step 6: Final answer
    x = 395,928.51

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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.