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Finding the Fourth Proportional to 402,697.08, 555,710.20 and 221,408.84

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Solution

The fourth proportional to 402,697.08, 555,710.20 and 221,408.84 is: 305,537.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,697.08 : 555,710.20 = 221,408.84 : x
  2. Step 2: Convert to fraction form
    402,697.08/555,710.20 = 221,408.84/x
  3. Step 3: Cross multiply
    402,697.08x = 555,710.20 × 221,408.84
  4. Step 4: Simplify right side
    402,697.08x = 123,039,150,758.17
  5. Step 5: Solve for x
    x = 123,039,150,758.17/402,697.08
  6. Step 6: Final answer
    x = 305,537.73

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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.