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Finding the Fourth Proportional to 320,435.70, 480,653.55 and 291,405.30

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Solution

The fourth proportional to 320,435.70, 480,653.55 and 291,405.30 is: 437,107.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,435.70 : 480,653.55 = 291,405.30 : x
  2. Step 2: Convert to fraction form
    320,435.70/480,653.55 = 291,405.30/x
  3. Step 3: Cross multiply
    320,435.70x = 480,653.55 × 291,405.30
  4. Step 4: Simplify right side
    320,435.70x = 140,064,991,933.82
  5. Step 5: Solve for x
    x = 140,064,991,933.82/320,435.70
  6. Step 6: Final answer
    x = 437,107.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.