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Finding the Fourth Proportional to 529,385, 730,551.30 and 290,921

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Solution

The fourth proportional to 529,385, 730,551.30 and 290,921 is: 401,470.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    529,385 : 730,551.30 = 290,921 : x
  2. Step 2: Convert to fraction form
    529,385/730,551.30 = 290,921/x
  3. Step 3: Cross multiply
    529,385x = 730,551.30 × 290,921
  4. Step 4: Simplify right side
    529,385x = 212,532,714,747.30
  5. Step 5: Solve for x
    x = 212,532,714,747.30/529,385
  6. Step 6: Final answer
    x = 401,470.98

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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.