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Finding the Fourth Proportional to 687,562.03, 948,817.38 and 381,637.54

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Solution

The fourth proportional to 687,562.03, 948,817.38 and 381,637.54 is: 526,649.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,562.03 : 948,817.38 = 381,637.54 : x
  2. Step 2: Convert to fraction form
    687,562.03/948,817.38 = 381,637.54/x
  3. Step 3: Cross multiply
    687,562.03x = 948,817.38 × 381,637.54
  4. Step 4: Simplify right side
    687,562.03x = 362,104,330,812.45
  5. Step 5: Solve for x
    x = 362,104,330,812.45/687,562.03
  6. Step 6: Final answer
    x = 526,649.69

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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.