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Finding the Fourth Proportional to 686,548.37, 947,492.64 and 380,720.52

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Solution

The fourth proportional to 686,548.37, 947,492.64 and 380,720.52 is: 525,425.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,548.37 : 947,492.64 = 380,720.52 : x
  2. Step 2: Convert to fraction form
    686,548.37/947,492.64 = 380,720.52/x
  3. Step 3: Cross multiply
    686,548.37x = 947,492.64 × 380,720.52
  4. Step 4: Simplify right side
    686,548.37x = 360,729,890,596.97
  5. Step 5: Solve for x
    x = 360,729,890,596.97/686,548.37
  6. Step 6: Final answer
    x = 525,425.31

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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.