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Finding the Fourth Proportional to 279,612.79, 385,851.87 and 158,738.21

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Solution

The fourth proportional to 279,612.79, 385,851.87 and 158,738.21 is: 219,050.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,612.79 : 385,851.87 = 158,738.21 : x
  2. Step 2: Convert to fraction form
    279,612.79/385,851.87 = 158,738.21/x
  3. Step 3: Cross multiply
    279,612.79x = 385,851.87 × 158,738.21
  4. Step 4: Simplify right side
    279,612.79x = 61,249,435,168.95
  5. Step 5: Solve for x
    x = 61,249,435,168.95/279,612.79
  6. Step 6: Final answer
    x = 219,050.91

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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.