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Finding the Fourth Proportional to 528,521.69, 729,361.91 and 286,804.31

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Solution

The fourth proportional to 528,521.69, 729,361.91 and 286,804.31 is: 395,791.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,521.69 : 729,361.91 = 286,804.31 : x
  2. Step 2: Convert to fraction form
    528,521.69/729,361.91 = 286,804.31/x
  3. Step 3: Cross multiply
    528,521.69x = 729,361.91 × 286,804.31
  4. Step 4: Simplify right side
    528,521.69x = 209,184,135,691.02
  5. Step 5: Solve for x
    x = 209,184,135,691.02/528,521.69
  6. Step 6: Final answer
    x = 395,791.02

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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.