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Finding the Fourth Proportional to 528,553.31, 729,404.06 and 286,835.90

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Solution

The fourth proportional to 528,553.31, 729,404.06 and 286,835.90 is: 395,833.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,553.31 : 729,404.06 = 286,835.90 : x
  2. Step 2: Convert to fraction form
    528,553.31/729,404.06 = 286,835.90/x
  3. Step 3: Cross multiply
    528,553.31x = 729,404.06 × 286,835.90
  4. Step 4: Simplify right side
    528,553.31x = 209,219,264,932.55
  5. Step 5: Solve for x
    x = 209,219,264,932.55/528,553.31
  6. Step 6: Final answer
    x = 395,833.80

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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.