Home / 679,941.20-938,319.80-378,135.20

Finding the Fourth Proportional to 679,941.20, 938,319.80 and 378,135.20

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Solution

The fourth proportional to 679,941.20, 938,319.80 and 378,135.20 is: 521,827.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,941.20 : 938,319.80 = 378,135.20 : x
  2. Step 2: Convert to fraction form
    679,941.20/938,319.80 = 378,135.20/x
  3. Step 3: Cross multiply
    679,941.20x = 938,319.80 × 378,135.20
  4. Step 4: Simplify right side
    679,941.20x = 354,811,745,236.96
  5. Step 5: Solve for x
    x = 354,811,745,236.96/679,941.20
  6. Step 6: Final answer
    x = 521,827.10

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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.