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Finding the Fourth Proportional to 405,495.15, 608,335.11 and 215,855.60

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Solution

The fourth proportional to 405,495.15, 608,335.11 and 215,855.60 is: 323,832.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,495.15 : 608,335.11 = 215,855.60 : x
  2. Step 2: Convert to fraction form
    405,495.15/608,335.11 = 215,855.60/x
  3. Step 3: Cross multiply
    405,495.15x = 608,335.11 × 215,855.60
  4. Step 4: Simplify right side
    405,495.15x = 131,312,537,128.44
  5. Step 5: Solve for x
    x = 131,312,537,128.44/405,495.15
  6. Step 6: Final answer
    x = 323,832.57

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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.