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Finding the Fourth Proportional to 1,339,747.60, 2,009,621.40 and 808,306.60

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Solution

The fourth proportional to 1,339,747.60, 2,009,621.40 and 808,306.60 is: 1,212,459.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,339,747.60 : 2,009,621.40 = 808,306.60 : x
  2. Step 2: Convert to fraction form
    1,339,747.60/2,009,621.40 = 808,306.60/x
  3. Step 3: Cross multiply
    1,339,747.60x = 2,009,621.40 × 808,306.60
  4. Step 4: Simplify right side
    1,339,747.60x = 1,624,390,241,121.24
  5. Step 5: Solve for x
    x = 1,624,390,241,121.24/1,339,747.60
  6. Step 6: Final answer
    x = 1,212,459.90

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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.