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Finding the Fourth Proportional to 939,765.60, 1,409,648.40 and 656,330.40

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Solution

The fourth proportional to 939,765.60, 1,409,648.40 and 656,330.40 is: 984,495.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    939,765.60 : 1,409,648.40 = 656,330.40 : x
  2. Step 2: Convert to fraction form
    939,765.60/1,409,648.40 = 656,330.40/x
  3. Step 3: Cross multiply
    939,765.60x = 1,409,648.40 × 656,330.40
  4. Step 4: Simplify right side
    939,765.60x = 925,195,098,231.36
  5. Step 5: Solve for x
    x = 925,195,098,231.36/939,765.60
  6. Step 6: Final answer
    x = 984,495.60

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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.