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Finding the Fourth Proportional to 481,805.10, 722,707.65 and 257,856.30

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Solution

The fourth proportional to 481,805.10, 722,707.65 and 257,856.30 is: 386,784.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    481,805.10 : 722,707.65 = 257,856.30 : x
  2. Step 2: Convert to fraction form
    481,805.10/722,707.65 = 257,856.30/x
  3. Step 3: Cross multiply
    481,805.10x = 722,707.65 × 257,856.30
  4. Step 4: Simplify right side
    481,805.10x = 186,354,720,610.70
  5. Step 5: Solve for x
    x = 186,354,720,610.70/481,805.10
  6. Step 6: Final answer
    x = 386,784.45

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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.