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Finding the Fourth Proportional to 290,400.30, 435,600.45 and 80,037.90

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Solution

The fourth proportional to 290,400.30, 435,600.45 and 80,037.90 is: 120,056.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,400.30 : 435,600.45 = 80,037.90 : x
  2. Step 2: Convert to fraction form
    290,400.30/435,600.45 = 80,037.90/x
  3. Step 3: Cross multiply
    290,400.30x = 435,600.45 × 80,037.90
  4. Step 4: Simplify right side
    290,400.30x = 34,864,545,257.06
  5. Step 5: Solve for x
    x = 34,864,545,257.06/290,400.30
  6. Step 6: Final answer
    x = 120,056.85

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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.