Home / 278,780.42-384,718.48-171,420.60

Finding the Fourth Proportional to 278,780.42, 384,718.48 and 171,420.60

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Solution

The fourth proportional to 278,780.42, 384,718.48 and 171,420.60 is: 236,561.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,780.42 : 384,718.48 = 171,420.60 : x
  2. Step 2: Convert to fraction form
    278,780.42/384,718.48 = 171,420.60/x
  3. Step 3: Cross multiply
    278,780.42x = 384,718.48 × 171,420.60
  4. Step 4: Simplify right side
    278,780.42x = 65,948,672,672.69
  5. Step 5: Solve for x
    x = 65,948,672,672.69/278,780.42
  6. Step 6: Final answer
    x = 236,561.35

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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.