Home / 638,128.27-880,622.94-351,658.63

Finding the Fourth Proportional to 638,128.27, 880,622.94 and 351,658.63

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Solution

The fourth proportional to 638,128.27, 880,622.94 and 351,658.63 is: 485,292.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,128.27 : 880,622.94 = 351,658.63 : x
  2. Step 2: Convert to fraction form
    638,128.27/880,622.94 = 351,658.63/x
  3. Step 3: Cross multiply
    638,128.27x = 880,622.94 × 351,658.63
  4. Step 4: Simplify right side
    638,128.27x = 309,678,656,626.97
  5. Step 5: Solve for x
    x = 309,678,656,626.97/638,128.27
  6. Step 6: Final answer
    x = 485,292.18

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.