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Finding the Fourth Proportional to 423,431.60, 634,664.21 and 170,550.16

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Solution

The fourth proportional to 423,431.60, 634,664.21 and 170,550.16 is: 255,630.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,431.60 : 634,664.21 = 170,550.16 : x
  2. Step 2: Convert to fraction form
    423,431.60/634,664.21 = 170,550.16/x
  3. Step 3: Cross multiply
    423,431.60x = 634,664.21 × 170,550.16
  4. Step 4: Simplify right side
    423,431.60x = 108,242,081,081.71
  5. Step 5: Solve for x
    x = 108,242,081,081.71/423,431.60
  6. Step 6: Final answer
    x = 255,630.62

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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.