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Finding the Fourth Proportional to 684,632.39, 944,720.01 and 378,660.15

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Solution

The fourth proportional to 684,632.39, 944,720.01 and 378,660.15 is: 522,510.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    684,632.39 : 944,720.01 = 378,660.15 : x
  2. Step 2: Convert to fraction form
    684,632.39/944,720.01 = 378,660.15/x
  3. Step 3: Cross multiply
    684,632.39x = 944,720.01 × 378,660.15
  4. Step 4: Simplify right side
    684,632.39x = 357,727,820,694.60
  5. Step 5: Solve for x
    x = 357,727,820,694.60/684,632.39
  6. Step 6: Final answer
    x = 522,510.81

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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.