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Finding the Fourth Proportional to 686,566.62, 947,518.08 and 380,738.93

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Solution

The fourth proportional to 686,566.62, 947,518.08 and 380,738.93 is: 525,450.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,566.62 : 947,518.08 = 380,738.93 : x
  2. Step 2: Convert to fraction form
    686,566.62/947,518.08 = 380,738.93/x
  3. Step 3: Cross multiply
    686,566.62x = 947,518.08 × 380,738.93
  4. Step 4: Simplify right side
    686,566.62x = 360,757,015,197.26
  5. Step 5: Solve for x
    x = 360,757,015,197.26/686,566.62
  6. Step 6: Final answer
    x = 525,450.85

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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.