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Finding the Fourth Proportional to 291,690.40, 437,881.20 and 289,616.80

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Solution

The fourth proportional to 291,690.40, 437,881.20 and 289,616.80 is: 434,768.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,690.40 : 437,881.20 = 289,616.80 : x
  2. Step 2: Convert to fraction form
    291,690.40/437,881.20 = 289,616.80/x
  3. Step 3: Cross multiply
    291,690.40x = 437,881.20 × 289,616.80
  4. Step 4: Simplify right side
    291,690.40x = 126,817,751,924.16
  5. Step 5: Solve for x
    x = 126,817,751,924.16/291,690.40
  6. Step 6: Final answer
    x = 434,768.34

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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.