Home / 638,440.68-881,054.10-351,971.04

Finding the Fourth Proportional to 638,440.68, 881,054.10 and 351,971.04

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Solution

The fourth proportional to 638,440.68, 881,054.10 and 351,971.04 is: 485,723.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,440.68 : 881,054.10 = 351,971.04 : x
  2. Step 2: Convert to fraction form
    638,440.68/881,054.10 = 351,971.04/x
  3. Step 3: Cross multiply
    638,440.68x = 881,054.10 × 351,971.04
  4. Step 4: Simplify right side
    638,440.68x = 310,105,527,873.26
  5. Step 5: Solve for x
    x = 310,105,527,873.26/638,440.68
  6. Step 6: Final answer
    x = 485,723.32

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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.