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Finding the Fourth Proportional to 145,428.40, 203,738 and 145,428.40

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Solution

The fourth proportional to 145,428.40, 203,738 and 145,428.40 is: 203,738

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,428.40 : 203,738 = 145,428.40 : x
  2. Step 2: Convert to fraction form
    145,428.40/203,738 = 145,428.40/x
  3. Step 3: Cross multiply
    145,428.40x = 203,738 × 145,428.40
  4. Step 4: Simplify right side
    145,428.40x = 29,629,291,359.20
  5. Step 5: Solve for x
    x = 29,629,291,359.20/145,428.40
  6. Step 6: Final answer
    x = 203,738

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.