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Finding the Fourth Proportional to 528,635.71, 729,517.63 and 286,918.28

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Solution

The fourth proportional to 528,635.71, 729,517.63 and 286,918.28 is: 395,947.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,635.71 : 729,517.63 = 286,918.28 : x
  2. Step 2: Convert to fraction form
    528,635.71/729,517.63 = 286,918.28/x
  3. Step 3: Cross multiply
    528,635.71x = 729,517.63 × 286,918.28
  4. Step 4: Simplify right side
    528,635.71x = 209,311,944,735.78
  5. Step 5: Solve for x
    x = 209,311,944,735.78/528,635.71
  6. Step 6: Final answer
    x = 395,947.42

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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.