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Finding the Fourth Proportional to 428,903.40, 591,913.80 and 247,648.80

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Solution

The fourth proportional to 428,903.40, 591,913.80 and 247,648.80 is: 341,771.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,903.40 : 591,913.80 = 247,648.80 : x
  2. Step 2: Convert to fraction form
    428,903.40/591,913.80 = 247,648.80/x
  3. Step 3: Cross multiply
    428,903.40x = 591,913.80 × 247,648.80
  4. Step 4: Simplify right side
    428,903.40x = 146,586,742,273.44
  5. Step 5: Solve for x
    x = 146,586,742,273.44/428,903.40
  6. Step 6: Final answer
    x = 341,771.00

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.