Home / 638,128.77-880,623.63-351,659.13

Finding the Fourth Proportional to 638,128.77, 880,623.63 and 351,659.13

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Solution

The fourth proportional to 638,128.77, 880,623.63 and 351,659.13 is: 485,292.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,128.77 : 880,623.63 = 351,659.13 : x
  2. Step 2: Convert to fraction form
    638,128.77/880,623.63 = 351,659.13/x
  3. Step 3: Cross multiply
    638,128.77x = 880,623.63 × 351,659.13
  4. Step 4: Simplify right side
    638,128.77x = 309,679,339,583.24
  5. Step 5: Solve for x
    x = 309,679,339,583.24/638,128.77
  6. Step 6: Final answer
    x = 485,292.87

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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.