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Finding the Fourth Proportional to 320,601.60, 442,350.72 and 207,288

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Solution

The fourth proportional to 320,601.60, 442,350.72 and 207,288 is: 286,006.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,601.60 : 442,350.72 = 207,288 : x
  2. Step 2: Convert to fraction form
    320,601.60/442,350.72 = 207,288/x
  3. Step 3: Cross multiply
    320,601.60x = 442,350.72 × 207,288
  4. Step 4: Simplify right side
    320,601.60x = 91,693,996,047.36
  5. Step 5: Solve for x
    x = 91,693,996,047.36/320,601.60
  6. Step 6: Final answer
    x = 286,006.05

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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.