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Finding the Fourth Proportional to 615,215.70, 922,823.55 and 389,845.35

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Solution

The fourth proportional to 615,215.70, 922,823.55 and 389,845.35 is: 584,768.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,215.70 : 922,823.55 = 389,845.35 : x
  2. Step 2: Convert to fraction form
    615,215.70/922,823.55 = 389,845.35/x
  3. Step 3: Cross multiply
    615,215.70x = 922,823.55 × 389,845.35
  4. Step 4: Simplify right side
    615,215.70x = 359,758,469,837.99
  5. Step 5: Solve for x
    x = 359,758,469,837.99/615,215.70
  6. Step 6: Final answer
    x = 584,768.03

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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.