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Finding the Fourth Proportional to 405,067.80, 607,601.70 and 138,830.93

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Solution

The fourth proportional to 405,067.80, 607,601.70 and 138,830.93 is: 208,246.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,067.80 : 607,601.70 = 138,830.93 : x
  2. Step 2: Convert to fraction form
    405,067.80/607,601.70 = 138,830.93/x
  3. Step 3: Cross multiply
    405,067.80x = 607,601.70 × 138,830.93
  4. Step 4: Simplify right side
    405,067.80x = 84,353,909,080.58
  5. Step 5: Solve for x
    x = 84,353,909,080.58/405,067.80
  6. Step 6: Final answer
    x = 208,246.40

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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.