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Finding the Fourth Proportional to 621,826.80, 932,279.40 and 421,647.60

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Solution

The fourth proportional to 621,826.80, 932,279.40 and 421,647.60 is: 632,158.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,826.80 : 932,279.40 = 421,647.60 : x
  2. Step 2: Convert to fraction form
    621,826.80/932,279.40 = 421,647.60/x
  3. Step 3: Cross multiply
    621,826.80x = 932,279.40 × 421,647.60
  4. Step 4: Simplify right side
    621,826.80x = 393,093,371,539.44
  5. Step 5: Solve for x
    x = 393,093,371,539.44/621,826.80
  6. Step 6: Final answer
    x = 632,158.94

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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.