Home / 686,933.75-947,929.88-380,988.17

Finding the Fourth Proportional to 686,933.75, 947,929.88 and 380,988.17

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Solution

The fourth proportional to 686,933.75, 947,929.88 and 380,988.17 is: 525,742.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,933.75 : 947,929.88 = 380,988.17 : x
  2. Step 2: Convert to fraction form
    686,933.75/947,929.88 = 380,988.17/x
  3. Step 3: Cross multiply
    686,933.75x = 947,929.88 × 380,988.17
  4. Step 4: Simplify right side
    686,933.75x = 361,150,070,269.52
  5. Step 5: Solve for x
    x = 361,150,070,269.52/686,933.75
  6. Step 6: Final answer
    x = 525,742.21

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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.