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Finding the Fourth Proportional to 303,428.80, 455,143.20 and 93,039.40

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Solution

The fourth proportional to 303,428.80, 455,143.20 and 93,039.40 is: 139,559.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,428.80 : 455,143.20 = 93,039.40 : x
  2. Step 2: Convert to fraction form
    303,428.80/455,143.20 = 93,039.40/x
  3. Step 3: Cross multiply
    303,428.80x = 455,143.20 × 93,039.40
  4. Step 4: Simplify right side
    303,428.80x = 42,346,250,242.08
  5. Step 5: Solve for x
    x = 42,346,250,242.08/303,428.80
  6. Step 6: Final answer
    x = 139,559.10

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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.