Home / 260,012.10-390,018.15-218,021.70

Finding the Fourth Proportional to 260,012.10, 390,018.15 and 218,021.70

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Solution

The fourth proportional to 260,012.10, 390,018.15 and 218,021.70 is: 327,032.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,012.10 : 390,018.15 = 218,021.70 : x
  2. Step 2: Convert to fraction form
    260,012.10/390,018.15 = 218,021.70/x
  3. Step 3: Cross multiply
    260,012.10x = 390,018.15 × 218,021.70
  4. Step 4: Simplify right side
    260,012.10x = 85,032,420,093.86
  5. Step 5: Solve for x
    x = 85,032,420,093.86/260,012.10
  6. Step 6: Final answer
    x = 327,032.55

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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.