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Finding the Fourth Proportional to 553,390.20, 830,085.30 and 542,892.60

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Solution

The fourth proportional to 553,390.20, 830,085.30 and 542,892.60 is: 814,338.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,390.20 : 830,085.30 = 542,892.60 : x
  2. Step 2: Convert to fraction form
    553,390.20/830,085.30 = 542,892.60/x
  3. Step 3: Cross multiply
    553,390.20x = 830,085.30 × 542,892.60
  4. Step 4: Simplify right side
    553,390.20x = 450,647,166,738.78
  5. Step 5: Solve for x
    x = 450,647,166,738.78/553,390.20
  6. Step 6: Final answer
    x = 814,338.90

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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.