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Finding the Fourth Proportional to 686,532.39, 947,470.59 and 380,704.62

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Solution

The fourth proportional to 686,532.39, 947,470.59 and 380,704.62 is: 525,403.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,532.39 : 947,470.59 = 380,704.62 : x
  2. Step 2: Convert to fraction form
    686,532.39/947,470.59 = 380,704.62/x
  3. Step 3: Cross multiply
    686,532.39x = 947,470.59 × 380,704.62
  4. Step 4: Simplify right side
    686,532.39x = 360,706,430,927.13
  5. Step 5: Solve for x
    x = 360,706,430,927.13/686,532.39
  6. Step 6: Final answer
    x = 525,403.37

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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.