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Finding the Fourth Proportional to 279,171.16, 385,256.45 and 158,312.98

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Solution

The fourth proportional to 279,171.16, 385,256.45 and 158,312.98 is: 218,472.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,171.16 : 385,256.45 = 158,312.98 : x
  2. Step 2: Convert to fraction form
    279,171.16/385,256.45 = 158,312.98/x
  3. Step 3: Cross multiply
    279,171.16x = 385,256.45 × 158,312.98
  4. Step 4: Simplify right side
    279,171.16x = 60,991,097,541.07
  5. Step 5: Solve for x
    x = 60,991,097,541.07/279,171.16
  6. Step 6: Final answer
    x = 218,472.06

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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.