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Finding the Fourth Proportional to 514,986.30, 772,479.45 and 135,906.30

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Solution

The fourth proportional to 514,986.30, 772,479.45 and 135,906.30 is: 203,859.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    514,986.30 : 772,479.45 = 135,906.30 : x
  2. Step 2: Convert to fraction form
    514,986.30/772,479.45 = 135,906.30/x
  3. Step 3: Cross multiply
    514,986.30x = 772,479.45 × 135,906.30
  4. Step 4: Simplify right side
    514,986.30x = 104,984,823,875.54
  5. Step 5: Solve for x
    x = 104,984,823,875.54/514,986.30
  6. Step 6: Final answer
    x = 203,859.45

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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.