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Finding the Fourth Proportional to 529,356, 730,511.28 and 290,892

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Solution

The fourth proportional to 529,356, 730,511.28 and 290,892 is: 401,430.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    529,356 : 730,511.28 = 290,892 : x
  2. Step 2: Convert to fraction form
    529,356/730,511.28 = 290,892/x
  3. Step 3: Cross multiply
    529,356x = 730,511.28 × 290,892
  4. Step 4: Simplify right side
    529,356x = 212,499,887,261.76
  5. Step 5: Solve for x
    x = 212,499,887,261.76/529,356
  6. Step 6: Final answer
    x = 401,430.96

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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.