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Finding the Fourth Proportional to 723,173.85, 997,912.86 and 400,856.54

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Solution

The fourth proportional to 723,173.85, 997,912.86 and 400,856.54 is: 553,144.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    723,173.85 : 997,912.86 = 400,856.54 : x
  2. Step 2: Convert to fraction form
    723,173.85/997,912.86 = 400,856.54/x
  3. Step 3: Cross multiply
    723,173.85x = 997,912.86 × 400,856.54
  4. Step 4: Simplify right side
    723,173.85x = 400,019,891,291.54
  5. Step 5: Solve for x
    x = 400,019,891,291.54/723,173.85
  6. Step 6: Final answer
    x = 553,144.85

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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.