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Finding the Fourth Proportional to 991,719.60, 1,487,579.40 and 984,346.80

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Solution

The fourth proportional to 991,719.60, 1,487,579.40 and 984,346.80 is: 1,476,520.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    991,719.60 : 1,487,579.40 = 984,346.80 : x
  2. Step 2: Convert to fraction form
    991,719.60/1,487,579.40 = 984,346.80/x
  3. Step 3: Cross multiply
    991,719.60x = 1,487,579.40 × 984,346.80
  4. Step 4: Simplify right side
    991,719.60x = 1,464,294,022,135.92
  5. Step 5: Solve for x
    x = 1,464,294,022,135.92/991,719.60
  6. Step 6: Final answer
    x = 1,476,520.20

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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.