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Finding the Fourth Proportional to 303,428.60, 455,142.90 and 197,140.40

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Solution

The fourth proportional to 303,428.60, 455,142.90 and 197,140.40 is: 295,710.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,428.60 : 455,142.90 = 197,140.40 : x
  2. Step 2: Convert to fraction form
    303,428.60/455,142.90 = 197,140.40/x
  3. Step 3: Cross multiply
    303,428.60x = 455,142.90 × 197,140.40
  4. Step 4: Simplify right side
    303,428.60x = 89,727,053,363.16
  5. Step 5: Solve for x
    x = 89,727,053,363.16/303,428.60
  6. Step 6: Final answer
    x = 295,710.60

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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.