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Finding the Fourth Proportional to 256,363.20, 384,539.74 and 76,570.39

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Solution

The fourth proportional to 256,363.20, 384,539.74 and 76,570.39 is: 114,854.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,363.20 : 384,539.74 = 76,570.39 : x
  2. Step 2: Convert to fraction form
    256,363.20/384,539.74 = 76,570.39/x
  3. Step 3: Cross multiply
    256,363.20x = 384,539.74 × 76,570.39
  4. Step 4: Simplify right side
    256,363.20x = 29,444,358,151.55
  5. Step 5: Solve for x
    x = 29,444,358,151.55/256,363.20
  6. Step 6: Final answer
    x = 114,854.07

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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.