Home / 431,140.36-643,338.69-386,310.44

Finding the Fourth Proportional to 431,140.36, 643,338.69 and 386,310.44

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Solution

The fourth proportional to 431,140.36, 643,338.69 and 386,310.44 is: 576,444.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,140.36 : 643,338.69 = 386,310.44 : x
  2. Step 2: Convert to fraction form
    431,140.36/643,338.69 = 386,310.44/x
  3. Step 3: Cross multiply
    431,140.36x = 643,338.69 × 386,310.44
  4. Step 4: Simplify right side
    431,140.36x = 248,528,452,402.92
  5. Step 5: Solve for x
    x = 248,528,452,402.92/431,140.36
  6. Step 6: Final answer
    x = 576,444.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.