Home / 686,939.42-947,979.71-380,994.53

Finding the Fourth Proportional to 686,939.42, 947,979.71 and 380,994.53

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Solution

The fourth proportional to 686,939.42, 947,979.71 and 380,994.53 is: 525,774.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,939.42 : 947,979.71 = 380,994.53 : x
  2. Step 2: Convert to fraction form
    686,939.42/947,979.71 = 380,994.53/x
  3. Step 3: Cross multiply
    686,939.42x = 947,979.71 × 380,994.53
  4. Step 4: Simplify right side
    686,939.42x = 361,175,077,416.12
  5. Step 5: Solve for x
    x = 361,175,077,416.12/686,939.42
  6. Step 6: Final answer
    x = 525,774.28

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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.