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Finding the Fourth Proportional to 291,699.20, 437,516.40 and 239,016.80

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Solution

The fourth proportional to 291,699.20, 437,516.40 and 239,016.80 is: 358,498.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,699.20 : 437,516.40 = 239,016.80 : x
  2. Step 2: Convert to fraction form
    291,699.20/437,516.40 = 239,016.80/x
  3. Step 3: Cross multiply
    291,699.20x = 437,516.40 × 239,016.80
  4. Step 4: Simplify right side
    291,699.20x = 104,573,769,875.52
  5. Step 5: Solve for x
    x = 104,573,769,875.52/291,699.20
  6. Step 6: Final answer
    x = 358,498.65

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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.