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Finding the Fourth Proportional to 553,405.20, 830,107.80 and 488,086.80

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Solution

The fourth proportional to 553,405.20, 830,107.80 and 488,086.80 is: 732,130.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,405.20 : 830,107.80 = 488,086.80 : x
  2. Step 2: Convert to fraction form
    553,405.20/830,107.80 = 488,086.80/x
  3. Step 3: Cross multiply
    553,405.20x = 830,107.80 × 488,086.80
  4. Step 4: Simplify right side
    553,405.20x = 405,164,659,757.04
  5. Step 5: Solve for x
    x = 405,164,659,757.04/553,405.20
  6. Step 6: Final answer
    x = 732,130.20

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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.