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Finding the Fourth Proportional to 319,415.40, 479,123.10 and 109,021.80

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Solution

The fourth proportional to 319,415.40, 479,123.10 and 109,021.80 is: 163,532.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,415.40 : 479,123.10 = 109,021.80 : x
  2. Step 2: Convert to fraction form
    319,415.40/479,123.10 = 109,021.80/x
  3. Step 3: Cross multiply
    319,415.40x = 479,123.10 × 109,021.80
  4. Step 4: Simplify right side
    319,415.40x = 52,234,862,783.58
  5. Step 5: Solve for x
    x = 52,234,862,783.58/319,415.40
  6. Step 6: Final answer
    x = 163,532.70

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1.5x scale

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.