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Finding the Fourth Proportional to 279,297.50, 385,427.31 and 151,970.90

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Solution

The fourth proportional to 279,297.50, 385,427.31 and 151,970.90 is: 209,718.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,297.50 : 385,427.31 = 151,970.90 : x
  2. Step 2: Convert to fraction form
    279,297.50/385,427.31 = 151,970.90/x
  3. Step 3: Cross multiply
    279,297.50x = 385,427.31 × 151,970.90
  4. Step 4: Simplify right side
    279,297.50x = 58,573,735,185.28
  5. Step 5: Solve for x
    x = 58,573,735,185.28/279,297.50
  6. Step 6: Final answer
    x = 209,718.08

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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.