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Finding the Fourth Proportional to 611,911.44, 917,427.50 and 287,516.61

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Solution

The fourth proportional to 611,911.44, 917,427.50 and 287,516.61 is: 431,068.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,911.44 : 917,427.50 = 287,516.61 : x
  2. Step 2: Convert to fraction form
    611,911.44/917,427.50 = 287,516.61/x
  3. Step 3: Cross multiply
    611,911.44x = 917,427.50 × 287,516.61
  4. Step 4: Simplify right side
    611,911.44x = 263,775,648,154.61
  5. Step 5: Solve for x
    x = 263,775,648,154.61/611,911.44
  6. Step 6: Final answer
    x = 431,068.34

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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.