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Finding the Fourth Proportional to 656,249.64, 905,624.81 and 354,443.64

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Solution

The fourth proportional to 656,249.64, 905,624.81 and 354,443.64 is: 489,132.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,249.64 : 905,624.81 = 354,443.64 : x
  2. Step 2: Convert to fraction form
    656,249.64/905,624.81 = 354,443.64/x
  3. Step 3: Cross multiply
    656,249.64x = 905,624.81 × 354,443.64
  4. Step 4: Simplify right side
    656,249.64x = 320,992,954,130.71
  5. Step 5: Solve for x
    x = 320,992,954,130.71/656,249.64
  6. Step 6: Final answer
    x = 489,132.39

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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.