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Finding the Fourth Proportional to 686,590.10, 947,550.17 and 380,696.84

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Solution

The fourth proportional to 686,590.10, 947,550.17 and 380,696.84 is: 525,392.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,590.10 : 947,550.17 = 380,696.84 : x
  2. Step 2: Convert to fraction form
    686,590.10/947,550.17 = 380,696.84/x
  3. Step 3: Cross multiply
    686,590.10x = 947,550.17 × 380,696.84
  4. Step 4: Simplify right side
    686,590.10x = 360,729,351,674.45
  5. Step 5: Solve for x
    x = 360,729,351,674.45/686,590.10
  6. Step 6: Final answer
    x = 525,392.59

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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.