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Finding the Fourth Proportional to 279,480.68, 385,671.24 and 152,156.72

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Solution

The fourth proportional to 279,480.68, 385,671.24 and 152,156.72 is: 209,969.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,480.68 : 385,671.24 = 152,156.72 : x
  2. Step 2: Convert to fraction form
    279,480.68/385,671.24 = 152,156.72/x
  3. Step 3: Cross multiply
    279,480.68x = 385,671.24 × 152,156.72
  4. Step 4: Simplify right side
    279,480.68x = 58,682,470,876.73
  5. Step 5: Solve for x
    x = 58,682,470,876.73/279,480.68
  6. Step 6: Final answer
    x = 209,969.69

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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.