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Finding the Fourth Proportional to 306,659.30, 423,189.80 and 170,690.32

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Solution

The fourth proportional to 306,659.30, 423,189.80 and 170,690.32 is: 235,552.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,659.30 : 423,189.80 = 170,690.32 : x
  2. Step 2: Convert to fraction form
    306,659.30/423,189.80 = 170,690.32/x
  3. Step 3: Cross multiply
    306,659.30x = 423,189.80 × 170,690.32
  4. Step 4: Simplify right side
    306,659.30x = 72,234,399,413.34
  5. Step 5: Solve for x
    x = 72,234,399,413.34/306,659.30
  6. Step 6: Final answer
    x = 235,552.62

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.