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Finding the Fourth Proportional to 279,498.99, 385,689.15 and 158,642.74

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Solution

The fourth proportional to 279,498.99, 385,689.15 and 158,642.74 is: 218,915.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,498.99 : 385,689.15 = 158,642.74 : x
  2. Step 2: Convert to fraction form
    279,498.99/385,689.15 = 158,642.74/x
  3. Step 3: Cross multiply
    279,498.99x = 385,689.15 × 158,642.74
  4. Step 4: Simplify right side
    279,498.99x = 61,186,783,544.27
  5. Step 5: Solve for x
    x = 61,186,783,544.27/279,498.99
  6. Step 6: Final answer
    x = 218,915.94

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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.