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Finding the Fourth Proportional to 1,641,972.76, 2,265,960.90 and 916,795.96

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Solution

The fourth proportional to 1,641,972.76, 2,265,960.90 and 916,795.96 is: 1,265,199.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,641,972.76 : 2,265,960.90 = 916,795.96 : x
  2. Step 2: Convert to fraction form
    1,641,972.76/2,265,960.90 = 916,795.96/x
  3. Step 3: Cross multiply
    1,641,972.76x = 2,265,960.90 × 916,795.96
  4. Step 4: Simplify right side
    1,641,972.76x = 2,077,423,798,637.96
  5. Step 5: Solve for x
    x = 2,077,423,798,637.96/1,641,972.76
  6. Step 6: Final answer
    x = 1,265,199.92

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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.