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Finding the Fourth Proportional to 686,551, 947,470.34 and 380,607.92

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Solution

The fourth proportional to 686,551, 947,470.34 and 380,607.92 is: 525,255.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,551 : 947,470.34 = 380,607.92 : x
  2. Step 2: Convert to fraction form
    686,551/947,470.34 = 380,607.92/x
  3. Step 3: Cross multiply
    686,551x = 947,470.34 × 380,607.92
  4. Step 4: Simplify right side
    686,551x = 360,614,715,369.09
  5. Step 5: Solve for x
    x = 360,614,715,369.09/686,551
  6. Step 6: Final answer
    x = 525,255.54

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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.