Home / 679,941.18-938,319.78-378,135.18

Finding the Fourth Proportional to 679,941.18, 938,319.78 and 378,135.18

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Solution

The fourth proportional to 679,941.18, 938,319.78 and 378,135.18 is: 521,827.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,941.18 : 938,319.78 = 378,135.18 : x
  2. Step 2: Convert to fraction form
    679,941.18/938,319.78 = 378,135.18/x
  3. Step 3: Cross multiply
    679,941.18x = 938,319.78 × 378,135.18
  4. Step 4: Simplify right side
    679,941.18x = 354,811,718,907.86
  5. Step 5: Solve for x
    x = 354,811,718,907.86/679,941.18
  6. Step 6: Final answer
    x = 521,827.08

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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.