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Finding the Fourth Proportional to 279,479.96, 385,690.42 and 152,157.72

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Solution

The fourth proportional to 279,479.96, 385,690.42 and 152,157.72 is: 209,982.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,479.96 : 385,690.42 = 152,157.72 : x
  2. Step 2: Convert to fraction form
    279,479.96/385,690.42 = 152,157.72/x
  3. Step 3: Cross multiply
    279,479.96x = 385,690.42 × 152,157.72
  4. Step 4: Simplify right side
    279,479.96x = 58,685,774,933.04
  5. Step 5: Solve for x
    x = 58,685,774,933.04/279,479.96
  6. Step 6: Final answer
    x = 209,982.05

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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.