Home / 679,741.19-938,067.53-389,408.87

Finding the Fourth Proportional to 679,741.19, 938,067.53 and 389,408.87

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Solution

The fourth proportional to 679,741.19, 938,067.53 and 389,408.87 is: 537,398.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,741.19 : 938,067.53 = 389,408.87 : x
  2. Step 2: Convert to fraction form
    679,741.19/938,067.53 = 389,408.87/x
  3. Step 3: Cross multiply
    679,741.19x = 938,067.53 × 389,408.87
  4. Step 4: Simplify right side
    679,741.19x = 365,291,810,203.61
  5. Step 5: Solve for x
    x = 365,291,810,203.61/679,741.19
  6. Step 6: Final answer
    x = 537,398.38

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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.