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Finding the Fourth Proportional to 687,570.72, 948,854.88 and 381,652.80

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Solution

The fourth proportional to 687,570.72, 948,854.88 and 381,652.80 is: 526,684.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,570.72 : 948,854.88 = 381,652.80 : x
  2. Step 2: Convert to fraction form
    687,570.72/948,854.88 = 381,652.80/x
  3. Step 3: Cross multiply
    687,570.72x = 948,854.88 × 381,652.80
  4. Step 4: Simplify right side
    687,570.72x = 362,133,121,745.66
  5. Step 5: Solve for x
    x = 362,133,121,745.66/687,570.72
  6. Step 6: Final answer
    x = 526,684.91

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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.