Home / 638,859.16-958,081.40-212,280.42

Finding the Fourth Proportional to 638,859.16, 958,081.40 and 212,280.42

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Solution

The fourth proportional to 638,859.16, 958,081.40 and 212,280.42 is: 318,351.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,859.16 : 958,081.40 = 212,280.42 : x
  2. Step 2: Convert to fraction form
    638,859.16/958,081.40 = 212,280.42/x
  3. Step 3: Cross multiply
    638,859.16x = 958,081.40 × 212,280.42
  4. Step 4: Simplify right side
    638,859.16x = 203,381,921,986.19
  5. Step 5: Solve for x
    x = 203,381,921,986.19/638,859.16
  6. Step 6: Final answer
    x = 318,351.73

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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.