Home / 402,539.20-555,508.40-218,777.76

Finding the Fourth Proportional to 402,539.20, 555,508.40 and 218,777.76

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Solution

The fourth proportional to 402,539.20, 555,508.40 and 218,777.76 is: 301,915.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,539.20 : 555,508.40 = 218,777.76 : x
  2. Step 2: Convert to fraction form
    402,539.20/555,508.40 = 218,777.76/x
  3. Step 3: Cross multiply
    402,539.20x = 555,508.40 × 218,777.76
  4. Step 4: Simplify right side
    402,539.20x = 121,532,882,319.30
  5. Step 5: Solve for x
    x = 121,532,882,319.30/402,539.20
  6. Step 6: Final answer
    x = 301,915.65

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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.