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Finding the Fourth Proportional to 405,303.20, 606,205.20 and 342,317.60

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Solution

The fourth proportional to 405,303.20, 606,205.20 and 342,317.60 is: 511,998.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,303.20 : 606,205.20 = 342,317.60 : x
  2. Step 2: Convert to fraction form
    405,303.20/606,205.20 = 342,317.60/x
  3. Step 3: Cross multiply
    405,303.20x = 606,205.20 × 342,317.60
  4. Step 4: Simplify right side
    405,303.20x = 207,514,709,171.52
  5. Step 5: Solve for x
    x = 207,514,709,171.52/405,303.20
  6. Step 6: Final answer
    x = 511,998.69

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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.