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Finding the Fourth Proportional to 686,447.84, 947,250.24 and 380,521.28

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Solution

The fourth proportional to 686,447.84, 947,250.24 and 380,521.28 is: 525,092.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,447.84 : 947,250.24 = 380,521.28 : x
  2. Step 2: Convert to fraction form
    686,447.84/947,250.24 = 380,521.28/x
  3. Step 3: Cross multiply
    686,447.84x = 947,250.24 × 380,521.28
  4. Step 4: Simplify right side
    686,447.84x = 360,448,873,805.11
  5. Step 5: Solve for x
    x = 360,448,873,805.11/686,447.84
  6. Step 6: Final answer
    x = 525,092.88

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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.