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Finding the Fourth Proportional to 279,605.72, 385,843.94 and 152,281.64

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Solution

The fourth proportional to 279,605.72, 385,843.94 and 152,281.64 is: 210,142.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,605.72 : 385,843.94 = 152,281.64 : x
  2. Step 2: Convert to fraction form
    279,605.72/385,843.94 = 152,281.64/x
  3. Step 3: Cross multiply
    279,605.72x = 385,843.94 × 152,281.64
  4. Step 4: Simplify right side
    279,605.72x = 58,756,947,967.26
  5. Step 5: Solve for x
    x = 58,756,947,967.26/279,605.72
  6. Step 6: Final answer
    x = 210,142.15

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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.