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Finding the Fourth Proportional to 1,305,813.20, 1,958,719.80 and 744,904.40

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Solution

The fourth proportional to 1,305,813.20, 1,958,719.80 and 744,904.40 is: 1,117,356.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,305,813.20 : 1,958,719.80 = 744,904.40 : x
  2. Step 2: Convert to fraction form
    1,305,813.20/1,958,719.80 = 744,904.40/x
  3. Step 3: Cross multiply
    1,305,813.20x = 1,958,719.80 × 744,904.40
  4. Step 4: Simplify right side
    1,305,813.20x = 1,459,058,997,387.12
  5. Step 5: Solve for x
    x = 1,459,058,997,387.12/1,305,813.20
  6. Step 6: Final answer
    x = 1,117,356.60

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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.