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Finding the Fourth Proportional to 218,018.40, 326,566.80 and 194,671.20

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Solution

The fourth proportional to 218,018.40, 326,566.80 and 194,671.20 is: 291,595.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,018.40 : 326,566.80 = 194,671.20 : x
  2. Step 2: Convert to fraction form
    218,018.40/326,566.80 = 194,671.20/x
  3. Step 3: Cross multiply
    218,018.40x = 326,566.80 × 194,671.20
  4. Step 4: Simplify right side
    218,018.40x = 63,573,150,836.16
  5. Step 5: Solve for x
    x = 63,573,150,836.16/218,018.40
  6. Step 6: Final answer
    x = 291,595.35

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.