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Finding the Fourth Proportional to 686,704.30, 947,663.15 and 380,793.62

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Solution

The fourth proportional to 686,704.30, 947,663.15 and 380,793.62 is: 525,501.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,704.30 : 947,663.15 = 380,793.62 : x
  2. Step 2: Convert to fraction form
    686,704.30/947,663.15 = 380,793.62/x
  3. Step 3: Cross multiply
    686,704.30x = 947,663.15 × 380,793.62
  4. Step 4: Simplify right side
    686,704.30x = 360,864,081,894.29
  5. Step 5: Solve for x
    x = 360,864,081,894.29/686,704.30
  6. Step 6: Final answer
    x = 525,501.42

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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.