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Finding the Fourth Proportional to 686,597.49, 947,504.39 and 380,672.91

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Solution

The fourth proportional to 686,597.49, 947,504.39 and 380,672.91 is: 525,328.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,597.49 : 947,504.39 = 380,672.91 : x
  2. Step 2: Convert to fraction form
    686,597.49/947,504.39 = 380,672.91/x
  3. Step 3: Cross multiply
    686,597.49x = 947,504.39 × 380,672.91
  4. Step 4: Simplify right side
    686,597.49x = 360,689,251,475.71
  5. Step 5: Solve for x
    x = 360,689,251,475.71/686,597.49
  6. Step 6: Final answer
    x = 525,328.53

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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.