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Finding the Fourth Proportional to 612,755.76, 845,590.82 and 340,817.80

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Solution

The fourth proportional to 612,755.76, 845,590.82 and 340,817.80 is: 470,321.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,755.76 : 845,590.82 = 340,817.80 : x
  2. Step 2: Convert to fraction form
    612,755.76/845,590.82 = 340,817.80/x
  3. Step 3: Cross multiply
    612,755.76x = 845,590.82 × 340,817.80
  4. Step 4: Simplify right side
    612,755.76x = 288,192,402,972.60
  5. Step 5: Solve for x
    x = 288,192,402,972.60/612,755.76
  6. Step 6: Final answer
    x = 470,321.82

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.