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Finding the Fourth Proportional to 687,518.56, 948,768.38 and 381,597.56

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Solution

The fourth proportional to 687,518.56, 948,768.38 and 381,597.56 is: 526,600.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,518.56 : 948,768.38 = 381,597.56 : x
  2. Step 2: Convert to fraction form
    687,518.56/948,768.38 = 381,597.56/x
  3. Step 3: Cross multiply
    687,518.56x = 948,768.38 × 381,597.56
  4. Step 4: Simplify right side
    687,518.56x = 362,047,698,813.15
  5. Step 5: Solve for x
    x = 362,047,698,813.15/687,518.56
  6. Step 6: Final answer
    x = 526,600.62

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.