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Finding the Fourth Proportional to 290,810.73, 436,285.68 and 140,875.75

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Solution

The fourth proportional to 290,810.73, 436,285.68 and 140,875.75 is: 211,347.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,810.73 : 436,285.68 = 140,875.75 : x
  2. Step 2: Convert to fraction form
    290,810.73/436,285.68 = 140,875.75/x
  3. Step 3: Cross multiply
    290,810.73x = 436,285.68 × 140,875.75
  4. Step 4: Simplify right side
    290,810.73x = 61,462,072,384.26
  5. Step 5: Solve for x
    x = 61,462,072,384.26/290,810.73
  6. Step 6: Final answer
    x = 211,347.33

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.