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Finding the Fourth Proportional to 303,416.70, 455,125.05 and 103,719.30

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Solution

The fourth proportional to 303,416.70, 455,125.05 and 103,719.30 is: 155,578.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,416.70 : 455,125.05 = 103,719.30 : x
  2. Step 2: Convert to fraction form
    303,416.70/455,125.05 = 103,719.30/x
  3. Step 3: Cross multiply
    303,416.70x = 455,125.05 × 103,719.30
  4. Step 4: Simplify right side
    303,416.70x = 47,205,251,598.47
  5. Step 5: Solve for x
    x = 47,205,251,598.47/303,416.70
  6. Step 6: Final answer
    x = 155,578.95

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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.