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Finding the Fourth Proportional to 686,636.22, 947,520.03 and 380,694.74

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Solution

The fourth proportional to 686,636.22, 947,520.03 and 380,694.74 is: 525,337.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,636.22 : 947,520.03 = 380,694.74 : x
  2. Step 2: Convert to fraction form
    686,636.22/947,520.03 = 380,694.74/x
  3. Step 3: Cross multiply
    686,636.22x = 947,520.03 × 380,694.74
  4. Step 4: Simplify right side
    686,636.22x = 360,715,886,014.24
  5. Step 5: Solve for x
    x = 360,715,886,014.24/686,636.22
  6. Step 6: Final answer
    x = 525,337.69

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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.