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Finding the Fourth Proportional to 528,657.96, 729,528.42 and 286,935.36

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Solution

The fourth proportional to 528,657.96, 729,528.42 and 286,935.36 is: 395,960.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,657.96 : 729,528.42 = 286,935.36 : x
  2. Step 2: Convert to fraction form
    528,657.96/729,528.42 = 286,935.36/x
  3. Step 3: Cross multiply
    528,657.96x = 729,528.42 × 286,935.36
  4. Step 4: Simplify right side
    528,657.96x = 209,327,498,163.21
  5. Step 5: Solve for x
    x = 209,327,498,163.21/528,657.96
  6. Step 6: Final answer
    x = 395,960.17

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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.