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Finding the Fourth Proportional to 291,603.44, 402,431.28 and 219,856.88

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Solution

The fourth proportional to 291,603.44, 402,431.28 and 219,856.88 is: 303,416.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,603.44 : 402,431.28 = 219,856.88 : x
  2. Step 2: Convert to fraction form
    291,603.44/402,431.28 = 219,856.88/x
  3. Step 3: Cross multiply
    291,603.44x = 402,431.28 × 219,856.88
  4. Step 4: Simplify right side
    291,603.44x = 88,477,285,635.21
  5. Step 5: Solve for x
    x = 88,477,285,635.21/291,603.44
  6. Step 6: Final answer
    x = 303,416.47

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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.