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Finding the Fourth Proportional to 355,687.20, 533,336.40 and 145,087.20

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Solution

The fourth proportional to 355,687.20, 533,336.40 and 145,087.20 is: 217,551.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,687.20 : 533,336.40 = 145,087.20 : x
  2. Step 2: Convert to fraction form
    355,687.20/533,336.40 = 145,087.20/x
  3. Step 3: Cross multiply
    355,687.20x = 533,336.40 × 145,087.20
  4. Step 4: Simplify right side
    355,687.20x = 77,380,284,934.08
  5. Step 5: Solve for x
    x = 77,380,284,934.08/355,687.20
  6. Step 6: Final answer
    x = 217,551.50

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1.5x scale

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.