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Finding the Fourth Proportional to 644,674.43, 889,667.19 and 354,284.16

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Solution

The fourth proportional to 644,674.43, 889,667.19 and 354,284.16 is: 488,921.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,674.43 : 889,667.19 = 354,284.16 : x
  2. Step 2: Convert to fraction form
    644,674.43/889,667.19 = 354,284.16/x
  3. Step 3: Cross multiply
    644,674.43x = 889,667.19 × 354,284.16
  4. Step 4: Simplify right side
    644,674.43x = 315,194,993,088.71
  5. Step 5: Solve for x
    x = 315,194,993,088.71/644,674.43
  6. Step 6: Final answer
    x = 488,921.20

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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.