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Finding the Fourth Proportional to 687,590.55, 948,773.79 and 381,669.27

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Solution

The fourth proportional to 687,590.55, 948,773.79 and 381,669.27 is: 526,647.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,590.55 : 948,773.79 = 381,669.27 : x
  2. Step 2: Convert to fraction form
    687,590.55/948,773.79 = 381,669.27/x
  3. Step 3: Cross multiply
    687,590.55x = 948,773.79 × 381,669.27
  4. Step 4: Simplify right side
    687,590.55x = 362,117,799,824.43
  5. Step 5: Solve for x
    x = 362,117,799,824.43/687,590.55
  6. Step 6: Final answer
    x = 526,647.44

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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.