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Finding the Fourth Proportional to 557,138.58, 765,891.14 and 479,328.20

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Solution

The fourth proportional to 557,138.58, 765,891.14 and 479,328.20 is: 658,926.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    557,138.58 : 765,891.14 = 479,328.20 : x
  2. Step 2: Convert to fraction form
    557,138.58/765,891.14 = 479,328.20/x
  3. Step 3: Cross multiply
    557,138.58x = 765,891.14 × 479,328.20
  4. Step 4: Simplify right side
    557,138.58x = 367,113,221,532.15
  5. Step 5: Solve for x
    x = 367,113,221,532.15/557,138.58
  6. Step 6: Final answer
    x = 658,926.23

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.