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Finding the Fourth Proportional to 645,998.51, 891,447.33 and 355,604.10

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Solution

The fourth proportional to 645,998.51, 891,447.33 and 355,604.10 is: 490,716.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,998.51 : 891,447.33 = 355,604.10 : x
  2. Step 2: Convert to fraction form
    645,998.51/891,447.33 = 355,604.10/x
  3. Step 3: Cross multiply
    645,998.51x = 891,447.33 × 355,604.10
  4. Step 4: Simplify right side
    645,998.51x = 317,002,319,246.80
  5. Step 5: Solve for x
    x = 317,002,319,246.80/645,998.51
  6. Step 6: Final answer
    x = 490,716.80

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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.