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Finding the Fourth Proportional to 1,641,966.76, 2,265,952.62 and 916,789.96

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Solution

The fourth proportional to 1,641,966.76, 2,265,952.62 and 916,789.96 is: 1,265,191.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,641,966.76 : 2,265,952.62 = 916,789.96 : x
  2. Step 2: Convert to fraction form
    1,641,966.76/2,265,952.62 = 916,789.96/x
  3. Step 3: Cross multiply
    1,641,966.76x = 2,265,952.62 × 916,789.96
  4. Step 4: Simplify right side
    1,641,966.76x = 2,077,402,611,851.70
  5. Step 5: Solve for x
    x = 2,077,402,611,851.70/1,641,966.76
  6. Step 6: Final answer
    x = 1,265,191.64

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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.