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Finding the Fourth Proportional to 636,986.90, 955,480.35 and 257,906.90

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Solution

The fourth proportional to 636,986.90, 955,480.35 and 257,906.90 is: 386,860.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,986.90 : 955,480.35 = 257,906.90 : x
  2. Step 2: Convert to fraction form
    636,986.90/955,480.35 = 257,906.90/x
  3. Step 3: Cross multiply
    636,986.90x = 955,480.35 × 257,906.90
  4. Step 4: Simplify right side
    636,986.90x = 246,424,975,079.42
  5. Step 5: Solve for x
    x = 246,424,975,079.42/636,986.90
  6. Step 6: Final answer
    x = 386,860.35

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.