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Finding the Fourth Proportional to 279,272.16, 385,403.70 and 151,955.94

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Solution

The fourth proportional to 279,272.16, 385,403.70 and 151,955.94 is: 209,703.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,272.16 : 385,403.70 = 151,955.94 : x
  2. Step 2: Convert to fraction form
    279,272.16/385,403.70 = 151,955.94/x
  3. Step 3: Cross multiply
    279,272.16x = 385,403.70 × 151,955.94
  4. Step 4: Simplify right side
    279,272.16x = 58,564,381,512.98
  5. Step 5: Solve for x
    x = 58,564,381,512.98/279,272.16
  6. Step 6: Final answer
    x = 209,703.61

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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.