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Finding the Fourth Proportional to 303,421.80, 455,132.70 and 103,748.70

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Solution

The fourth proportional to 303,421.80, 455,132.70 and 103,748.70 is: 155,623.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,421.80 : 455,132.70 = 103,748.70 : x
  2. Step 2: Convert to fraction form
    303,421.80/455,132.70 = 103,748.70/x
  3. Step 3: Cross multiply
    303,421.80x = 455,132.70 × 103,748.70
  4. Step 4: Simplify right side
    303,421.80x = 47,219,425,952.49
  5. Step 5: Solve for x
    x = 47,219,425,952.49/303,421.80
  6. Step 6: Final answer
    x = 155,623.05

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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.