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Finding the Fourth Proportional to 687,452.04, 948,797.82 and 400,972.11

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Solution

The fourth proportional to 687,452.04, 948,797.82 and 400,972.11 is: 553,408.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,452.04 : 948,797.82 = 400,972.11 : x
  2. Step 2: Convert to fraction form
    687,452.04/948,797.82 = 400,972.11/x
  3. Step 3: Cross multiply
    687,452.04x = 948,797.82 × 400,972.11
  4. Step 4: Simplify right side
    687,452.04x = 380,441,463,848.80
  5. Step 5: Solve for x
    x = 380,441,463,848.80/687,452.04
  6. Step 6: Final answer
    x = 553,408.01

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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.