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Finding the Fourth Proportional to 351,492.80, 527,239.20 and 257,489.60

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Solution

The fourth proportional to 351,492.80, 527,239.20 and 257,489.60 is: 386,234.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    351,492.80 : 527,239.20 = 257,489.60 : x
  2. Step 2: Convert to fraction form
    351,492.80/527,239.20 = 257,489.60/x
  3. Step 3: Cross multiply
    351,492.80x = 527,239.20 × 257,489.60
  4. Step 4: Simplify right side
    351,492.80x = 135,758,610,712.32
  5. Step 5: Solve for x
    x = 135,758,610,712.32/351,492.80
  6. Step 6: Final answer
    x = 386,234.40

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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.