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Finding the Fourth Proportional to 687,586.55, 948,768.27 and 381,665.27

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Solution

The fourth proportional to 687,586.55, 948,768.27 and 381,665.27 is: 526,641.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,586.55 : 948,768.27 = 381,665.27 : x
  2. Step 2: Convert to fraction form
    687,586.55/948,768.27 = 381,665.27/x
  3. Step 3: Cross multiply
    687,586.55x = 948,768.27 × 381,665.27
  4. Step 4: Simplify right side
    687,586.55x = 362,111,893,193.14
  5. Step 5: Solve for x
    x = 362,111,893,193.14/687,586.55
  6. Step 6: Final answer
    x = 526,641.91

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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.