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Finding the Fourth Proportional to 611,390.20, 917,085.30 and 546,071.80

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Solution

The fourth proportional to 611,390.20, 917,085.30 and 546,071.80 is: 819,107.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,390.20 : 917,085.30 = 546,071.80 : x
  2. Step 2: Convert to fraction form
    611,390.20/917,085.30 = 546,071.80/x
  3. Step 3: Cross multiply
    611,390.20x = 917,085.30 × 546,071.80
  4. Step 4: Simplify right side
    611,390.20x = 500,794,420,524.54
  5. Step 5: Solve for x
    x = 500,794,420,524.54/611,390.20
  6. Step 6: Final answer
    x = 819,107.70

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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.