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Finding the Fourth Proportional to 1,208,609.64, 1,666,974.96 and 1,155,007.08

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Solution

The fourth proportional to 1,208,609.64, 1,666,974.96 and 1,155,007.08 is: 1,593,043.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,208,609.64 : 1,666,974.96 = 1,155,007.08 : x
  2. Step 2: Convert to fraction form
    1,208,609.64/1,666,974.96 = 1,155,007.08/x
  3. Step 3: Cross multiply
    1,208,609.64x = 1,666,974.96 × 1,155,007.08
  4. Step 4: Simplify right side
    1,208,609.64x = 1,925,367,880,982.72
  5. Step 5: Solve for x
    x = 1,925,367,880,982.72/1,208,609.64
  6. Step 6: Final answer
    x = 1,593,043.62

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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.