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Finding the Fourth Proportional to 279,015.82, 385,024.57 and 156,501.45

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Solution

The fourth proportional to 279,015.82, 385,024.57 and 156,501.45 is: 215,962.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,015.82 : 385,024.57 = 156,501.45 : x
  2. Step 2: Convert to fraction form
    279,015.82/385,024.57 = 156,501.45/x
  3. Step 3: Cross multiply
    279,015.82x = 385,024.57 × 156,501.45
  4. Step 4: Simplify right side
    279,015.82x = 60,256,903,099.37
  5. Step 5: Solve for x
    x = 60,256,903,099.37/279,015.82
  6. Step 6: Final answer
    x = 215,962.32

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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.