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Finding the Fourth Proportional to 686,672.12, 947,602.86 and 380,748.41

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Solution

The fourth proportional to 686,672.12, 947,602.86 and 380,748.41 is: 525,430.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,672.12 : 947,602.86 = 380,748.41 : x
  2. Step 2: Convert to fraction form
    686,672.12/947,602.86 = 380,748.41/x
  3. Step 3: Cross multiply
    686,672.12x = 947,602.86 × 380,748.41
  4. Step 4: Simplify right side
    686,672.12x = 360,798,277,518.44
  5. Step 5: Solve for x
    x = 360,798,277,518.44/686,672.12
  6. Step 6: Final answer
    x = 525,430.22

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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.