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Finding the Fourth Proportional to 280,628.70, 420,943.05 and 250,302.30

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Solution

The fourth proportional to 280,628.70, 420,943.05 and 250,302.30 is: 375,453.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,628.70 : 420,943.05 = 250,302.30 : x
  2. Step 2: Convert to fraction form
    280,628.70/420,943.05 = 250,302.30/x
  3. Step 3: Cross multiply
    280,628.70x = 420,943.05 × 250,302.30
  4. Step 4: Simplify right side
    280,628.70x = 105,363,013,584.02
  5. Step 5: Solve for x
    x = 105,363,013,584.02/280,628.70
  6. Step 6: Final answer
    x = 375,453.45

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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.