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Finding the Fourth Proportional to 1,318,882.60, 1,978,323.90 and 477,130.60

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Solution

The fourth proportional to 1,318,882.60, 1,978,323.90 and 477,130.60 is: 715,695.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,318,882.60 : 1,978,323.90 = 477,130.60 : x
  2. Step 2: Convert to fraction form
    1,318,882.60/1,978,323.90 = 477,130.60/x
  3. Step 3: Cross multiply
    1,318,882.60x = 1,978,323.90 × 477,130.60
  4. Step 4: Simplify right side
    1,318,882.60x = 943,918,869,401.34
  5. Step 5: Solve for x
    x = 943,918,869,401.34/1,318,882.60
  6. Step 6: Final answer
    x = 715,695.90

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Similar ratio
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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.