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Finding the Fourth Proportional to 687,452.05, 948,797.94 and 400,972.15

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Solution

The fourth proportional to 687,452.05, 948,797.94 and 400,972.15 is: 553,408.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,452.05 : 948,797.94 = 400,972.15 : x
  2. Step 2: Convert to fraction form
    687,452.05/948,797.94 = 400,972.15/x
  3. Step 3: Cross multiply
    687,452.05x = 948,797.94 × 400,972.15
  4. Step 4: Simplify right side
    687,452.05x = 380,441,549,917.37
  5. Step 5: Solve for x
    x = 380,441,549,917.37/687,452.05
  6. Step 6: Final answer
    x = 553,408.12

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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.