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Finding the Fourth Proportional to 793,978.40, 1,191,313.20 and 399,994.40

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Solution

The fourth proportional to 793,978.40, 1,191,313.20 and 399,994.40 is: 600,165.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    793,978.40 : 1,191,313.20 = 399,994.40 : x
  2. Step 2: Convert to fraction form
    793,978.40/1,191,313.20 = 399,994.40/x
  3. Step 3: Cross multiply
    793,978.40x = 1,191,313.20 × 399,994.40
  4. Step 4: Simplify right side
    793,978.40x = 476,518,608,646.08
  5. Step 5: Solve for x
    x = 476,518,608,646.08/793,978.40
  6. Step 6: Final answer
    x = 600,165.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.