Home / 429,638,856.40-642,946,630.20-393,359,150.80

Finding the Fourth Proportional to 429,638,856.40, 642,946,630.20 and 393,359,150.80

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Solution

The fourth proportional to 429,638,856.40, 642,946,630.20 and 393,359,150.80 is: 588,654,719.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,638,856.40 : 642,946,630.20 = 393,359,150.80 : x
  2. Step 2: Convert to fraction form
    429,638,856.40/642,946,630.20 = 393,359,150.80/x
  3. Step 3: Cross multiply
    429,638,856.40x = 642,946,630.20 × 393,359,150.80
  4. Step 4: Simplify right side
    429,638,856.40x = 252,908,940,465,193,664
  5. Step 5: Solve for x
    x = 252,908,940,465,193,664/429,638,856.40
  6. Step 6: Final answer
    x = 588,654,719.42

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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.