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Finding the Fourth Proportional to 1,857,766.40, 2,786,649.60 and 912,982.40

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Solution

The fourth proportional to 1,857,766.40, 2,786,649.60 and 912,982.40 is: 1,369,473.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,857,766.40 : 2,786,649.60 = 912,982.40 : x
  2. Step 2: Convert to fraction form
    1,857,766.40/2,786,649.60 = 912,982.40/x
  3. Step 3: Cross multiply
    1,857,766.40x = 2,786,649.60 × 912,982.40
  4. Step 4: Simplify right side
    1,857,766.40x = 2,544,162,039,767.04
  5. Step 5: Solve for x
    x = 2,544,162,039,767.04/1,857,766.40
  6. Step 6: Final answer
    x = 1,369,473.60

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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.