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Finding the Fourth Proportional to 439,620.40, 659,430.60 and 282,156.40

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Solution

The fourth proportional to 439,620.40, 659,430.60 and 282,156.40 is: 423,234.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,620.40 : 659,430.60 = 282,156.40 : x
  2. Step 2: Convert to fraction form
    439,620.40/659,430.60 = 282,156.40/x
  3. Step 3: Cross multiply
    439,620.40x = 659,430.60 × 282,156.40
  4. Step 4: Simplify right side
    439,620.40x = 186,062,564,145.84
  5. Step 5: Solve for x
    x = 186,062,564,145.84/439,620.40
  6. Step 6: Final answer
    x = 423,234.60

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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.